AT&T HTC One (M8) will receive the Android 5.0 Lollipop update tomorrow in the U.S. MO versi, company’s VP of product management confirmed on Twitter that the new firmware update has obtained the technical approval.
AT&T HTC One (M8) Owners! We just received technical approval for Lollipop OS! Thank you for all your patience, OTA to start tomorrow.
— Mo Versi (@moversi) April 7, 2015
The OTA update will bring the material design, new ART runtime and a ton of improvements on the HTC One M8.
Note that OTA update will roll-out in phases, so it may take several days to hit all the devices on carrier.
AT&T is the last major carrier in the U.S. pushing the Lollipop update to M8. The device is already running the latest software version on T-Mobile, Sprint, and Verizon.