AT&T released a software update for the HTC One M9 (OPJA110) on July 15, 2015.
HTC One M9 users,
AT&T released Android Version 5.1 for OTA download today!
- Drag down the notification bar with two fingers, and then tap Settings > General.
- Tap About Phone > AT&T software update.
- Tap Check for updates.
- Tap Update Now.
- Follow the on-screen instructions.
Please note: Devices require Wi-Fi connection to download the update, and is recommended to be fully-charged.
To learn more about the software update, please go to www.att.com/softwareupdates!