I bought a ATT locked HTC M8 on Amazon, everything works great except for the front camera. I installed a rom (without the bloatware), changed the radio to 1.14, installed a gpe rom and nothing. It's s-off and sim unlocked.
I can't click the "selfie mode" and any app that use the front camera can't recognize it.
Looking in google I found this: https://community.sprint.com/baw/message/764589#764589