I bought HTC One (M8) outside of North America without knowing it's a Verizon smartphone.
I use it in a GSM / Edge / HSPA network but I have the following bug:
When I try to enable the Hotspot feature the phone says that a Verizon Wireless LTE SIM card is not detected, so the feature is unavailable. The same goes with sharing the cellular internet by cable feature.
BTW HTC support referred me to Verizon.
Please advise.