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T-Mobile tech chief throws shade at Verizon's 5G network

Neville Ray wants to see a 5G coverage map from the rival carrier.

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T-Mobile wants to see a Verizon 5G coverage map.

Angela Lang/CNET

T-Mobile Chief Technology Officer Neville Ray is doubtful of Verizon's 5G network expansion plans, tweeting that he wants to see a coverage map. His comments follow Verizon announcing earlier Wednesday the expansion of its 5G network to Atlanta, Detroit, Indianapolis and Washington, DC, in addition to already being live in Chicago, Denver, Minneapolis-St. Paul and Providence.

5G, also already launched in some parts of the US by T-Mobile, Sprint and AT&T, is being tapped by smartphones to provide faster speeds and more capacity.

"What is Verizon's 'secret' 5G plan to expand 5G coverage beyond the limits of mmWave?!" Ray tweeted, referring to the millimeter-wave high-band spectrum being used by Verizon for its 5G network.

"Verizon says they will have a 'multi-spectrum strategy.' So they don't have one now... when will they have one? Tomorrow?!" he added in another tweet.

T-Mobile's $26.5 billion merger with Sprint was OK'd this week, giving it access to multiple 5G spectrum bands. Spectrum, or radio airwaves, make the wireless system work -- and by adding spectrum in several bands, capacity and speeds will keep increasing.

Ray expressed doubts Verizon will be able to deliver gigabit-speed 5G with its current spectrum strategy.

"Verizon says their 5G network will continue to have 'the speeds we're seeing now,'" he also tweeted Wednesday. "Where is this 'secret' spectrum coming from that will deliver Gigabit speeds… AND broad coverage?!"

Verizon declined to comment.

First published at 5:07 p.m. PT on July 31.
Updated on Aug. 1 at 8:26 a.m. PT: Verizon declined to comment.