It's an international version, not meant for use in the USA, although it may work on GSM networks like T-Mobile and AT&T, although may not work with all features or radio bands. It will not work on CDMA networks such as Verizon or Sprint.
Actually, yes it will work on Verizon's network.
Verizon HTC U11 is one of the first to ditch CDMA support | Pocketnow
https://www.androidheadlines.com/2017/06/htc-u11-can-used-verizon-even-without-cdma-support.html
Thanks for both feedback. Now, what should I do? I just had it for couple days. Is there a way I can make my calls better? I called both T-Mobile and HTC and they weren't of much help. Both blame the other side!!! Please help
Thanks for both feedback. Now, what should I do? I just had it for couple days. Is there a way I can make my calls better? I called both T-Mobile and HTC and they weren't of much help. Both blame the other side!!! Please help
Hmmm... That does make sense. Installing the US version OS/firmware may work.Well you certainly can't blame either of them. HTC didn't sell that device here, so the same radios for the bands on the North American unlocked version aren't enabled on the device you have. You may need to look at rooting and installing custom software, or trying to install the latest US unlocked software from HTC. that may get you up and going, but probably wouldn't support a second SIM slot.
Which is going to be gone in a couple of years anyway.Just remember that no matter what you do, you won't be able to use the phone on Verizon's CDMA networks.