Hi, im from chile and i have an HTC One M8 Sprint.... working with my carrier now !!! thank you so much !!! i was about to surrender and accept my m8 as a paperweight...
for other users.... i was like this...
HTC One M8 Harman Kardon Sprint (Sim Locked)
android 4.4.4
sense 6.0
ROM: Bad Boyz Sprint ONE M8 Harman v2.1 ART
API SDK: 6.25
Baseband: 1.08.20.0916
Unlocked Bootloader
Super user
Rooted device
TWRP
Thanks again...!!