​We attended the operator and vendor consortium of 5G Americas.  The themes of the show were: 5G, spectrum, cell siting, Asia-Pacific operator progress.  For the second time in the past couple weeks, we saw FCC Commissioner Michael O'Reilly present, and his key messages were similar both times, focusing on CBRS, C-Band and 6 GHz.  In attendance from the North American service provider side were AT&T, T-Mobile US, Shaw, and Sprint (we focused on NA operators mainly in this write-up).  Notable vendors included Cisco, Commscope, Ericsson, Intel, Kathrein, Mavenir, Nokia, Qualcomm, and Samsung.  We would say the most important theme from the show is the surge in interest in unlicensed spectrum, both for the use of mobile operators, as well as competing carriers, as well as by enterprises both for indoor and outdoor applications.  For this write-up, we are focusing primarily on comments made by some of the leading operators who attended the conference.

AT&T discussed mmWave, future 3GPP releases, 5G phones, Mobile Edge Computing and indoor cellular, mid-band spectrum strategies, 5 GHz spectrum usage, Mobile Edge Computing (MEC), StandAlone (SA), among other topics.  AT&T views mmWave as just a tool in the toolkit, so to speak, and not the only spectrum that is useful in 5G.  It considers mmWave to be most helpful in urban and potentially indoor settings.  Representatives said that future 5G-oriented Releases 16 & 17 are expected to be software upgrades to existing hardware and won't require new equipment to incorporate these new capabilities which will include network slicing.  AT&T is making a big deal about its Mobile Edge Computing (MEC) initiative.  At the conference, it emphasized MEC as having two main parts: a) expansion to about 100 edge sites (mostly Central Offices) from about 20 central locations in the LTE era and initially supporting packet core, and b) Microsoft Azure services managed end-to-end by AT&t.  The company also emphasized that it plans to pursue some indoor cellular opportunities, some that currently leverage 5 GHz using LAA technology, some that will leverage CBRS and some that will leverage mmWave.  We get the impression from AT&T that it is open in how it pursues future mid-band spectrum strategies.  Its strategy could change based on: a) the timing of the CBRS PAL licenses (currently slated for June 25, 2020), b) the potential for C-Band  private auctions (potentially in the mid 2020 timeframe), c) the potential for some or all of the 6 GHz spectrum availability (where Wi-Fi 6 would co-occupy), as well as other factors.  We learned that, at least in certain regions, the company is making very ample use of 5 GHz spectrum using LAA techniques.  AT&T seeing its picocells (small cells) get around 100 Mbps from LAA out of a total 130 Mbps inclusive of around three other licensed spectrums.  We were surprised the company makes such ample use of unlicensed spectrum where Wi-Fi currently exists.  The 5 GHz experience of AT&T leads us to think that 6 GHz, which promises to offer far more spectrum that the 5 GHz swath presently available, could be very beneficial to mobile operators and their consumers, as well as the Wi-Fi industry, and its consumers.  AT&T expects that by this time next year, it will be "pushing" 5G to all its customers, part as a result of handsets adopting 5G capabilities, part the result of its network seeing nationwide coverage.  Of the services that AT&T operates, it is installing mainly Packet Core in its MEC systems.  AT&T is also planning to run Microsoft Azure services in its MEC locations.   It expects that both Packet Core and Azure will see a 10-20 ms latency reduction by being located in MEC locations.  AT&T says that StandAlone (SA) is "just new software," and downplayed the significance of the upgrade from EPC/NonStandAlone (NSA) to SA.

Sprint "is all-in on 2.5 GHz mid-band deployments for 5G services."  Given the company's potential merger with T-Mobile USA, we view its network-build-out choices as being somewhat limited.  It has limited options because it increases its near-term value to its acquirer, T-Mobile, if it deploys 5G in 2.5 GHz.  Likewise, it is doesn't implement in mmWave, this reduces overlap with T-Mobile, who is deploying there.  The company reiterated that it had launched 5G in 9 markets.  It is seeing its peak speeds on 5G (aided by the fact that it has simultaneously upgraded hardware to Massive MIMO) be about 3-5 times that of its 8T8R LTE systems.  It currently covers 11M POPs and 2,100 square miles with 5G.  Sprint also shared that it sees RFPs from customers to replace Wi-Fi with 5G, though it didn't share more about this topic.  The company's experience is that in upgrading its macro base stations to Massive MIMO 64T64R capabilities, it is getting 3-4x faster throughput than its 8T8R systems, though in the field these measurements vary widely.  Additionally, Sprint said that its Massive MIMO systems relative to earlier systems show "generally the same coverage," with 1-2 dB better sometimes.  Sprint is exploring ORAN and vRAN but "not adopting near term."

Shaw (Canada) presented its mobile LTE and 5G efforts and plans.  Shaws plans are interesting because the company has significant cable services deployed in Canada.  The company said nearly all the mobile technology it has installed in the past three years are "5G-ready."  It will use 5G first in 600 MHz, then in mid-band (probably in 3.5 GHz) and the last in mmWave. Shaw expects that low-band 5G handsets will be available in 2020, and, similar to what AT&T said, it expects that is when 5G mobile will start in earnest in Canada.  Shaw admitted that it is behind where the US operators are in deploying 5G, but offered no apologies, as it felt it is where it needs to be from a competitive standpoint in Canada.  Almost laughing, Shaw explained that it would never consider deploying mmWave along highways, and that only high-density locations would get mmWave coverage.  Shaw's view that mmWave is for high-density locations was shared universally by other operators in attendance, including AT&T, Sprint and T-Mobile US.

T-Mobile US spokespersons explained that mmWave has seen some challenges, relative to initial expectations and that while it does get mmWave to operate beyond near-line-of-sight, the view of T-Mobile is that mmWave is "just part of 5G."  T-Mobile expects 3GPP Release 16 to be completed in 2020, but that it will be 2021 before it deploys Release 16, which won't require "a massive hardware refresh" and which will incorporate industrial and connected vehicles features.  T-Mobile views 5G as being appropriate for indoor installations because while mmWave has challenges penetrating glass and concrete, but when 5G operates in low and mid-band spectrums, the "issue goes away."  By 2020, T-Mobile expects StandAlone packet core to be ready, but since its current EPC/NonStandAlone (NSA) systems are already virtualized, the upgrade to SA is "not a forklift" upgrade.  T-Mobile says virtual RAN (vRAN) "will take time," and that it will "need accelerators," which we take to mean FPGA-based Network Interface Cards (NICs) or the like to allow servers to operate faster than just x86 processors will allow.

​We attended the CBRS Alliance event in Washington DC today, and by our rough estimate, about 350-400 people were in attendance representing groups such as regulators, legislators, lawyers, technology vendors, property owners, service providers, investors, media and analysts.  We were impressed with the widespread interest in the new shared spectrum technology and services running in the 3.5 GHz band that is now called “OnGo.”  We have researched CBRS for many years and found several acronyms and CBRS-specific terminology to be blossoming.  We found several themes at the CBRS Alliance event and a follow-on event at Federated Wireless, a SAS service provider, of special note: a) the OnGo experience will serve as a mold for regulators, operators and other interested parties not just in the US, but also the rest of the world, b) Tier 1 operators and WISPs appear focused on Fixed Wireless Access (FWA) deployments in CBRS spectrum, at least initially, c) many presenters focused on the “OnGo backhaul to gateways” use-case, at least as an initial opportunity, d) interested parties have a concern that PAL licenses may become very expensive when the auctions occur, and e) there were a very large number of devices supporting OnGo at this event.

Acronym soup.  The CBRS Alliance did its best to explain the various acronyms and how the various players work together.  It would take at least six pages to cover just the top-level details.  The idea here is that the 150 MHz of spectrum in the 3.5 GHz range was previously used exclusively by the US Department of Defense and is now going to be shared using a three-tier process, where the military (the incumbent) will have use of it when it needs, then private license holders will get next dibs (PAL), followed by general users (GAA).  Starting today, GAA users will begin use of the spectrum in the Initial Commercial Deployment (ICD) that was announced today, starting at 9 AM Eastern.  A group of service providers called Spectrum Access System (SAS) providers have been authorized to install radios on the US coastline that sense when the military is using the spectrum and send channel-use information to equipment that is operating in the CBRS spectrum.  These SAS providers will, therefore, coordinate the frequencies between incumbent, PAL, and GAA users.
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Our view on why OnGo and “Shared spectrum” matters.  We expect that by sharing spectrum amongst various parties, more traffic can move across a smaller range of frequency than by using the more common method of auctioning off frequency bands to be used exclusively by one entity.  We estimate that shared frequency will carry ten-times more traffic than frequency bands licensed for the exclusive use of single entities.  Thus, it is for the greater good that this OnGo / CBRS experience go the distance and allow a public demonstration of whether multi-tiered shared spectrum can succeed or not.  Already, we have the experience of shared spectrum in the 2.4 GHz and 5 GHz bands used by WiFi – there is no doubt this has been successful; in fact, most public estimates show about 80% of smartphone traffic is carried by WiFi rather than cellular systems, all of which as of yesterday was carried on licensed spectrum.  At the CBRS Alliance event, guest speaker, US FCC Commissioner Michael P. O’Reilly said that based on the success of OnGo, he expects similar models could be applied to additional spectrum (and he implied this might the sequential order of launch): C-band (3.7-4.2 GHz), 3.45-3.55 GHz, 3.1-3.45 GHz and 7 GHz (which we understand is meant to be the same thing as what is being discussed at 6 GHz by the WiFi community).

FWA opportunity is front and center.  Charter and AT&T focused their comments on their plans to deploy fixed broadband systems.  AT&T shared some impressive statistics about the performance of recent trials using Massive MIMO cell sites using distributed RAN over CBRS spectrum, which is connected to indoor baseband over fiber optics to the radio sites and then connects wirelessly to customer premises equipment mounted at the roofline: it said it achieved 140x12 Mbps at slightly over one mile over line of sight using 20 Mhz channels. Charter discussed it had deployed its first commercial FWA in Davidson City, NC to rural locations.  It also discussed how it uses dual SIM systems to allow customer coverage to Verizon’s cellular network. Charter also discussed private LTE, neutral host, and Industrial IoT use cases.  The Wireless Internet Service Provider’s Association (WISPA) President spoke about its members’ enthusiasm for OnGo and explained that 100’s of WISPs used the 3.65 GHz spectrum and expects more will use the 3.5 GHz / CBRS spectrum.  Currently, WISPA says WISPS in the US have 6 million customers.

OnGo as a backhaul.  We detected a theme that seems durable: CBRS spectrum can be used by enterprises with far-flung operations to save costs by reducing the installation of wired / optical cables and associated infrastructure.  There was an impressive list of vendors who had equipment at the show, a number of which were gateway devices that made connections between CBRS and other well-known protocols such as Ethernet and WiFi, to name a couple.  While OnGo/CBRS support is not as widespread on devices today, IoT devices supporting other wired and wireless systems certainly are, the list of which includes WiFi, Zigbee, Bluetooth, Ethernet and more.  We were taken by how compelling some presenters made a case for using CBRS simply assuming a reduction in new cabling to enable new systems such as kiosks, surveillance, digital signage, farming, and so on.  Many of these examples would increase the deployment of existing protocols like WiFi, Zigbee, Bluetooth, and Ethernet, instead of reducing their demand.  The idea that OnGo/CBRS competes with existing systems may be incorrect.

PAL auctions.  Commissioner O’Reilly said PAL auctions are scheduled for June 25, 2020.  In our formal and informal interviews, we understand there is a growing concern that CBRS spectrum auctions could be aggressively pursued not only by existing Tier 1 mobile operators but also by other players, not least of which could include MSOs and maybe even “Big Tech” companies.  Since the 3.5 GHz spectrum is where many countries besides the US have begun deploying 5G services, making equipment in these frequency bands commonplace, there is ample reason to want to use this spectrum in the US.  Bidders may raise the price high enough that enterprises will choose not to compete, and won’t view the CBRS spectrum as attractive as they had hoped.  In this case, PAL would look quite a bit more like a typical licensed spectrum, similar to other auctions.

OnGo devices abound.  At the show, the following vendors had devices on show (see pictures):  Sercomm, MultiTech, Sierra WIreless, Zyxel, Encore, Cradlepoint, AMIT Wireless, Commscope / Ruckus, Accelleran, Bai Cells, Cambium, Samsung, Google, LG Electronics, Sequans, Telit, JMA Wireless, Motorola Solutions, Cisco, BEC Technologies, Ericsson, ip access, BLINQ, Comba Telecom, and Westell.

​We attended media briefings at the Keysight World conference held near San Francisco, California, yesterday.  Keysight World San Francisco showed a more integrated Ixia as well as a further push towards 5G, automotive and energy, and data center and telecom.  Much of the companies conversations during the event related to synergies between these technologies.  Such as how to push the automotive industry forward using 5G and the need for edge computing in 5G.  As Keysight is involved at the beginning of the launches of many new cellular technologies, it has good insights into the timeline and progress of the 5G market.

One of our key takeaways from the show is the increased pervasiveness of Ethernet in the telecom and automotive industry as well as the significant increase in constant data creation.  All this data will need robust, and more intelligent networks to transport it.  We were also impressed that Keysight World will actually take place in 10 cities around the world, with San Francisco being the first.

Another interesting observation was just how global Keysight was in looking at products, for example in one session that we attended, much of the automotive effort in the company was located in Germany.

The main message of Ribbon keynotes was that Ribbon has moved from a voice and SBC focus to a broader scope including data and analytics, such as UCaaS, Security-as-a-Service, Service Assurance-as-a-Service, SIP Trunking-as-a-Service, SD-WAN, and analytics.  The company identified two major catalysts to the change in company scope: the August 2018 acquisition of enterprise SBC company Edgewater and the February 2019 acquisition of analytics company, anova. Additionally, the company confirmed that it is not pursuing service provider mobile market opportunities such as EPC or “full IMS” that are components of larget mobile equipment larger vendors.  Instead, Ribbon is pursuing the mobile market by offering overlay analytics services that allow SP customers to derive value from mobile operators using monetization, network, marketing, and customer care.  

The company’s core business is evolving.  For instance, the company has doubled down on the Enterprise market with its Edgewater acquisition, and a result, it emphasized that it is unique because it has both service provider and enterprise SBC product offerings.  The company has offered SBC on public cloud and reiterated that this capability has been available for one year.  The company highlighted that it has a Tier-1 Mobile Network Operator VoLTE Interconnect contract win. 

Analytics.  The company sees its opportunity in the analytics market is to deliver technology to the customer for the following cases:
•             Monetization (Targeting, Advertising, Sponsored Data, Campaign Efficacy)
•             Network (Reduce Network Cost, Improved Quality of Experience, Proactive Alarms, Network Service Assurance)
•             Marketing (Service bundles, churn reduction, product insights, inferred demographics)
•             Customer Care (customer experience, bill shock, most probably cause)

We are impressed with Ribbon’s technical capabilities when it comes to using GPUs.  The company has previously discussed the performance of its GPU based media interworking function as being 3.5x more powerful than a DSP-based system, or 9x more powerful than a CPU-based system and over 2x more power efficient.  The company says its GPU-based systems are generally available for its D-SBC and i-SBC functions.  It has evaluations at three operators: Tier-1 US MNO, Tier-1 US CSP, and Tier-1 Japan CSP.  We would not be surprised if some of these customers begin deploying soon.  One of its Tier-1 operators found that the GPU-based system costs half as much in capital spending and is 800% more power efficient. 

​Kandy, the white-label voice/messaging services brand of Ribbon discussed its success with customers such as BT, NUWAVE, AT&T, Hong Kong Broadband, Optus, and ecosystem partner, Five9.  It enables UCaaS, CPaaS and WebRTC services.  The company reiterated that it plans to go to market with partners, mainly service providers, instead of opening its own store-front that would compete with service providers.  The company says its customer pipeline is growing.

​Our big takeaway from its recent global analyst meeting was that Nokia is formalizing its enterprise business.  Of course, the company’s primary business, which focuses on telecom service providers, is undergoing major product updates, including towards 5G, Fixed Wireless Access and towards network slicing.  We have published about these topics in other posts relating to Nokia in the past several months, having attended other Nokia events, so we focus on topics we haven’t discussed recently.

The company acknowledges that telco capex is expected to be unexciting and is redoubling efforts to gather enterprise customers.  In 3Q18, Enterprise represented 5% of revenues.  The company expects 8% CAGR for Enterprise Networking.  Of course, the company covered many topics beyond enterprise, including its view on megatrends, the importance of spectrum instead of differentiation between 4G and 5G, residential WiFi and Fixed Wireless Access, its recent wins at major telcos, the impact of the recent re-organization, the impact of the trade war and other topics. 

Enterprise market, Private cellular and WiFi.  The company’s view is that private LTE will challenge WiFi for certain applications in its “strategic” enterprise markets, including for verticals such as logistics and transportation.  Considering the Nokia view, we expect private LTE and WiFi will co-exist in the future.  We think that Nokia can succeed with its private LTE strategy, because this is mostly a “greenfield” opportunity.  Many of the cases Nokia explains it is seeing success are outdoor, not indoor, where WiFi is so popular.  A number of industries are likely to adopt private LTE (mining, logistics are good examples), and later 5G, but we expect most every industry will maintain their reliance on WiFi.  We keep in mind that in light of the fact that 802.11ax (which began shipping 3Q18) incorporates many more cellular-like capabilities, WiFi will have a seat at the table for some time to come even in these critical industries.  Interestingly, by leveraging service provider channels, the company has plans to enter the “branch” enterprise network market, using SD-WAN as its “Trojan horse” to enter.

Megatrends.  From a strategy standpoint, Nokia sees megatrends: Ubiquitous connectivity, multi-cloud, deep analytics, industrial IoT and regulatory.
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Spectrum takes on new importance.  On mobile radio, the company focuses on spectrum differences as much as the difference between 4G and 5G.  The company’s view is all macro basestations should have mmWave.  Describing its 5G ramp, Nokia’s factory capacity related to 5G infrastructure has quadrupled this most recent quarter; and the company “went to volume shipments” on its new, in-house Reefshark chips in 3Q18. 

Residential WiFi and Fixed Wireless Access.  The company’s new mesh WiFi will be made available at its first service provider customer’s stores in the month of November.  This mesh technology is from the recent acquisition of Unium. The company’s first Fixed Wireless Access (FWA) customers have begun deployments, for both 4G cellular and WiGig (60 Ghz 802.11ad).  We understand that the 4G cellular projects are largely at mobile service providers working to leverage existing investments in their mobile infrastructure, while WiGig is in demand at enterprises and traditionally fixed-line service providers. The company expects 5G FWA infrastructure will be ready to ship in 2019.

Recent wins at service providers.  New wins announced €2B around this event include “frame wins” at major Chinese service providers

• China Mobile: radio access, core, passive optical networks, IP routing and optical transport, SDN, network management and professional services.
• China Telecom to improve country-wide 4G LTE coverage and hot spot capacity. Nokia will provide its end-to-end portfolio and solutions for China Telecom including FDD-LTE radio access, home CPE solutions, core routers, multi-service edge routers and optics as well as its services expertise.
• China Unicom deploy technologies across the country including Nokia FDD-LTE radio access, Multi-access Edge Computing, virtualized IMS, SDN, IP routing and optical transport, and fixed network equipment.

The company also emphasized its multi-billion dollar deal recently signed with T-Mobile US.  Neville Ray, CTO of T-Mobile US presented at the event.  Additionally, AT&T’s Chris Penrose, SVP IoT, discussed its relationship with Nokia using the WING service; this is a global IoT service that uses revenue co-sharing between AT&T, Nokia and the many regional service providers in non-AT&T locations.  AT&T made the point that IoT is a business service.  Telia, headquartered in Nokia rival’s Ericsson’s home country, Sweden, made a compelling presentation at the meeting, as well.

The impact of the recent re-organization.  On the day of its recent earnings call, the company announced a planned re-organization, along with some reductions in force, to reduce spending so the company can hit its year 2020 financial targets.  The importance of this re-org, from our standpoint, is that the Software division of the company will be in charge of managing several products that used to be part of the Mobile division beginning Jan 1, 2019.  Products moving from Mobile to Software include IMS CSCF and TAS.  We have verified that Packet Core (including EPC/4G and 5G Core) will remain in the ION (IP and Optical Networks) division, where it has been for years.
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Trade war.  According to Rajeev Suri, CEO of Nokia, Australia, UK, Korea, Japan, possibly Canada all may ban Chinese telecom gear.  Suri expects that Nokia’s “working assumptions” are that: (a) around 20-25% Chinese market share is available for foreign vendors, and (b) potentially, ZTE will take more share in China, and that (c) foreigners (like Nokia) will still be able to play. Suri explained that Nokia hasn’t seen Chinese vendors get more aggressive in Middle East and Africa (MEA).

Mid-band spectrum shortages in the US was the main thrust of the 5G Americas sponsors. The idea is that the rest of the world has lots of mid-band spectrum available and service providers in countries that could be considered economic leaders (Japan, Korea, China, Western European countries) have plenty of available mid-band spectrum that is ideal for 5G, while the US does not.  This group at 5G Americas, which includes service providers, vendors and standards bodies, is saying that US leadership in cellular infrastructure and the entire app economy that relies upon it may be at risk as 5G get deployed.

Other topics discussed:  AT&T is currently out for bid on its 5GC infrastructure, and this caused some interesting posturing by the vendor attendees (like Ericsson, Nokia, Cisco, Mavenir) at this conference, with each trying to identifying their strengths.  It seems the consensus is that all mobile operators in the US market are using Option 3X, an EPC anchoring system.  And, the consensus seems to be that US operators will need to move to 5GC once most traffic is coming over 5G Radio (“New Radio”).  Vendor selection appears an open field, once again, as 5GC has 13 different microservices, each which could theoretically be parsed out to different vendors.  Operators are saying, though, that while this multi-vendor selection may lead to savings on purchasing, it will increase integration spending, so these two have to be balanced out. 

Mobile Edge Computing:  The consensus is that a 50 mile radius (or others are saying 100 km) is considered the ‘edge,’ or the ‘low latency’ zone.  We expect, however, that the data forwarding plane (‘user plane’) will be distributed to, say, 100 locations within a territory like the US market, while the control plane will be much more centralized (perhaps as centralized as it is currently, where it might be considered to be like 1/4th the number of locations). 
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CBRS.  The consensus is that testing will be done by mid November 2018 and Initial Commercial Deployment by 1Q19, potentially spilling into 2Q19.  PAL auctions are expected by attendees to be a 2019 event, with 2020 traffic running on PAL spectrum. Commscope represented the views from a SAS standpoint for this discussion.There were discussions about the C-Band (6 Ghz) potentially using the same type of Automatic Frequency Coordination system, but the consensus is that it is too early to declare that the path forward.

We attended Mobile World Congress Americas (MWCa) in Los Angeles, CA this week, as well as the AT&T Spark event in San Francisco.  Since 5G is launching first the US, these two events became the public events where significant 5G-related announcements happened.

• Verizon.  Will launch 5G Fixed Wireless Access (FWA) on October 1 in four markets: Houston, Indianapolis, Los Angeles and Sacramento.
• AT&T.  The company reiterated its own 5G plans (mobile 5G by year-end 2018 in cities such as Atlanta, Charlotte, Dallas, Indianapolis, Oklahoma City, Raleigh, Waco, Houston, Jacksonville, Lousville, New Orleans and San Antonia), plus it made some announcements like that it is beginning 5G-ready CBRS equipment testing (using Samsung CBRS equipment and CommScope as SAS provider).  Also, at the Spark event on Monday, the company announced three strategic telecom equipment suppliers, Ericsson, Nokia and Samsung. 
• T-Mobile.  Announced that it had completed a Cisco vEPC system (upgradeable to 5G Core) carrying traffic for 70M users that was from Cisco.  It also announced that it signed a $3.5B 5G agreement with Ericsson.  This is in addition to the July 30 announcement made earlier with Nokia for $3.5B, as well.  Generally, the company has set expectations as recently as September 10 that it will provide nationwide 5G by the year 2020.
• Sprint.  Announced that it had demonstrated a 5G NR connection of Massive MIMO with Nokia equipment.

Additionally, discussions about spectrum in the US market were very active discussions.  Some points we picked up on:

• No new mid-band auctions will occur in the US market for another 2-3 years, so this means that new capacity is going to come from LAA (just announced on the iPhone Xs this week, as well) and from CBRS (discussed above).
• The "who has the fastest 5G throughput" battle will be won at the millimeter wave.  In other words, using millimeter was, speeds as high as 10 Gbps are possible, but with mid-band (1-6 Ghz), where LTE is currently deployed, cannot go much over 2 Gbps.  So, to beat the Ookla Speed Test, the mobile operators who deploy mmWave early will get a leg up.  However, in order to deploy mmWave, these have to be small-cells that are within 100 meters of users.  Since it is so difficult to get real-estate rights and backhaul for small cells, this is going to be a big challenge.  Nevertheless, this is how the battle will be won.
• T-Mobile's 600 Mhz rollout is now in 1,250 cities.  The company will eventually enable 600 Mhz 5G.  600 Mhz should dramatically improve T-Mobile coverage because it is low-band spectrum.