Download Official Oreo 2.21.401.1 RUU for HTC U Ultra

Alex Brian April 17, 2018

Finally the wait is over official Android 8.0 Oreo update for HTC U Ultra started rolling out in India. The update arrives as version 2.21.401.1 and bring a major update weighs above 1.77GB in size so you need to have a working internet connection to download the stock Oreo OTA update.

The Android 8.0 stock Oreo2.21.401.1 RUU update for HTC U Ultra brings multiple new features including Picture-in-picture, Autofill, optimized battery usage, other goodies of Oreo update includes features like Notification Dots, Notification channels, Android Instant Apps and latest security patches to enhance the security of the device.

Download Official Oreo 2.21.401.1 RUU for HTC U Ultra

Before going ahead prepare for the following things:

Install latest HTC USB drivers on PC by following this guide

Charge your device to minimum 70% to avoid shut down during the installation process.

Make sure your device is not rooted with stock recovery installed on it.

The Android 8.0 Oreo firmware for HTC U Ultra is only available via OTA as the moment. If you haven’t received the OTA update yet, call it in by going to Settings > About device > System updates. Or download the firmware RUU from the link below until it becomes available and install it manually on your device.