After first teasing the device over a year ago, Lenovo announced that its Flex 5G PC was available to purchase last month. It's sold by Verizon and Lenovo.com, and even on Lenovo's website, it's billed as supporting Verizon's 5G network. It's unlocked, of course, but you're only promised a regular old 4G LTE PC if you use it on another carrier.
That's not quite the case though, as you can see from the image above. While the Flex 5G is specifically certified for Verizon, 5G should work on any U.S. carrier, as the PC supports every 5G band that's in use in the U.S. These are the supported bands:
5NG n260, n261
LT B2, B4, B5, B7, B12, B13, B17, B25, B26, B38, B41, B66, B71WCDMA B2, B4, B5
UMTS: 1, 2, 4, 5, 6, 8, 9, 19LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 34, 38, 39, 40, 41, 42, 46, 48, 66, 71; 5G: n1, n2, n3, n5, n8, n12, n20, n28, n38, n41, n66, n71, n77, n78, n79, n260, n261
The n260 and n261 bands are both for mmWave, and they're in use for Verizon, T-Mobile, and AT&T. You can also see that it supports n41, which was Sprint's 2.5GHz band and is being shut down for use on T-Mobile. Finally, n5 and n71 are listed, which are for 850MHz on AT&T and 600MHz on T-Mobile, respectively.
While our unit works with 5G on carriers other than Verizon, 5G seems to be buggy on this PC in general, crashing the cellular driver occasionally when it switches from 4G to 5G. That's more of a software issue, since the hardware most definitely supports all U.S. carriers.