T-Mobile 5G: phones, coverage map and cities rollout

Image credit: T-Mobile
(Image credit: T-Mobile)

Next-gen 5G mobile networks are going live all over the country to enable users to casually download data at lightning-fast speeds, and T-Mobile has just activated its own.

Like Verizon, Sprint and AT&T, T-Mobile's initial network will operate on higher-frequency "millimeter wave" (mmWave) bands, which will supposedly provide faster speeds but have less range. (A lot less, if our early experiences with Verizon's 5G network in Chicago are representative.) 

But unlike the other carriers, T-Mobile will eventually augment its hyperlocal mmWave coverage with low-range bands that cover more area albeit at lower speeds for a network that will theoretically reach suburban and rural customers. It's unclear when those will go online, but at least it's a clear plan.

T-Mobile's 28 Ghz mmWave frequency network will be combined into a wider 5G setup with a lower-band 600 Mhz spectrum it aims to launch in 30 cities later in 2019, per CNET. This would theoretically combine with Sprint's mid-band 2.5 Ghz 5G network, assuming the two carriers' merger goes through.

The signature 5G phone coming to many of these carriers? The Samsung Galaxy S10 5G with its Snapdragon 855 chip, which doesn’t have a formal release date yet, but will be available to Verizon customers sometime in Q2 2019. T-Mobile customers can now purchase and use an S10 5G on the carrier's nascent 5G networks in six US cities, according to a blog post.

As expected, the S10 5G will only work on T-Mobile's mmWave networks - not the following mid- and low-range frequency networks, the carrier confirmed to The Verge.

T-Mobile 5G plans

T-Mobile still hasn't announced many details about the full extent of its rollout plans - indeed, we only learned about its initial six-city 5G network launch the day they went live. 

We also learned what its 5G network will cost...but only if its merger with Sprint goes through. Assuming both carriers combine into the so-called 'New T-Mobile,' the resulting super-carrier won't charge extra for 5G for at least three years along with "strong economic incentive for even lower prices in the future," according to a blog post.

T-Mobile 5G coverage map and rollout cities

T-Mobile previously asserted back in 2018 that it would bring 5G to 30 cities to start, and the first customers to get it will be in New York City, Los Angeles, Dallas, and Las Vegas. The carrier made good on its claims, launching in those four cities as well as Cleveland and Atlanta on June 28. 

What's more, T-Mobile did what Verizon and AT&T have thus far failed to do: provide coverage maps. That's right, you can actually go look at where customers should be able to get 5G service in cities where the 5G networks are live. That's a big gesture toward transparency that other carriers have refused to do.

Image credit: T-Mobile

Image credit: T-Mobile

(Image credit: T-Mobile)

For the sub-600mHz, we're waiting to hear about any devices that will support it.

After that is a broad rollout to rural customers. T-Mobile opted for sub-600MHz for its farther range, which should cover more area with less infrastructure than the high-frequency networks other carriers are building out.

Once fully launched, T-Mobile claims its network will cover over 95% of the country's around 62 million rural residents, per a company blog post. They might not see the network's about 450Mbps average download speeds, but two-thirds of them will get above 100Mbps by 2021 (up to 90% in 2024), which is still far better than the 30-40Mbps you'll get today.

The network was likely testing far earlier than its launch day. Per CNET, an employee of Speedtest.net owner Ookla managed to hook up to T-Mobile's network in NYC using one of the carrier's SIM cards plugged into an unlocked Samsung Galaxy S10 5G phone. The outlet reported high speeds just under 500 Mbps (download), which is still impressive even if it pales compared to the over-1 Gbps seen in Verizon's mmWave network in Chicago. 

We'll have to wait and see if this is a sign that T-Mobile is gearing up to go live.

T-Mobile 5G phones

Samsung Galaxy S10 5G

As with the other carriers, T-Mobile will also support the Samsung Galaxy S10 5G. From what we've seen, this will be a true top-tier device: a 6.7-inch AMOLED display, the latest Snapdragon 855 chip, 256GB of storage and 8GB of RAM. We don't know how much it'll cost; the closest comparison, the S10 Plus, starts with lower specs at a baseline of $999 / £899 (about AU$1,398).

The S10 5G is otherwise a stepped-up version of its S10 siblings, packing a trio of rear lenses (12MP wide, 16MP ultrawide and 12MP telephoto) as well as a fourth time of flight sensor to measure depth. There's another TOF sensor on the front for depth-augmented selfies. This phone is coming to T-Mobile customers sometime in summer.

S10 5G first, but not widespread

Early reports suggest the S10 5G won't, however, work on the broader nation-spanning primary network T-Mobile is working on now: a low-band (sub-600MHz) spectrum to power its early 5G networks. It's expected to offer the opposite of mmWave - less speed than high-frequency networks, but more range for better coverage. 

Eventually, it plans to supplement this with mid-frequency bands as part of its spectrum of service – it's currently testing millimeter wave in Atlanta, Los Angeles, Miami, New York, Ohio and a few other places (potentially covering 100 million people), per an MWC 2019 interview with PC Mag. But the carrier plans to add much of its mid-frequency bands after the carrier’s proposed merger with Sprint – which US Senators have opposed.

In lieu of those other bands, T-Mobile has carried on testing its sub-600MHz 5G network, and is purportedly rolling out 5G it in its planned first 30 cities, which customers won't be able to take advantage of until more phones come out. For the sub-600MHz line, this might not be until the second half of 2019, per CNET

The reason? There just aren’t any phones out that’ll work with the low-band network. Not yet, anyway.

Remember the Samsung Galaxy S10 5G? Its Snapdragon 855’s LTE modem doesn’t support 5G, so the phone relies on a discrete modem – the Qualcomm Snapdragon X50 – to connect. 

But the X50 modem doesn't support 'sub-6GHz' (in T-Mobile's case, its sub-600MHz) networks. At a Snapdragon summit back in December, Qualcomm’s president implied that a modem won’t be available to support T-Mobile’s early 5G networks until at least mid-2019, per PCMag.

Could T-Mobile's 5G plans change

So, in summary: aside from the S10 5G coming to its mmWave areas, we don’t know what other phones T-Mobile will offer on its low- or mid-band 5G network. 

If the carrier merges with Sprint, it's unclear if the combined company’s ur-network would support additional higher-band devices like those packing the Snapdragon 855/Qualcomm X50 modem setup (seen in the Samsung Galaxy S10 5G). 

That’s currently the only chip/modem combo available in the US, though that could change if T-Mobile secured a device running an existing but international 5G setup not run in the US (like that from Huawei or Samsung). Likewise if Intel or MediaTek release a 5G chip/modem later this year which works with T-Mobile’s low-band setup.

But that's just for early 2019. Later this year, things will change – starting with the next generation of Qualcomm modems the company announced before MWC 2019. The Snapdragon X55 modem will surpass this year's X50 in several ways, including supporting virtually any band in any region in the world. 

The X55 is expected to appear in phones later this year, which could include the Samsung Galaxy Note 10 or Google Pixel 4. It's all speculation from here, but the X55 should have a stronger showing in 2020 – when more phones appear that could connect to T-Mobile's 5G network.

In fact, T-Mobile CTO Neville Ray confirmed to PC Mag that the carrier would only launch its 5G network once phones were available on the X55 modem chip. We'll just have to wait for more phone details as they appear.