Camera, portrait mode does not work Ambient Display is not working System stability issues Encryption will change in the next preview build Some apps may not function as expected when running on this Developer preview release

Issue With MTP cannot copy rollback from PC to Phone

You should understand the risk of BRICKING your phone, read the instructions carefully and be 100% sure of what you are doing, and please always backup your important data before flashing.

Note: This upgrade method will erase all the contents of the phone, please be sure to backup first.



1. Download the latest ROM upgrade zip package from the specified server.

2. Copy the ROM upgrade package to the phone storage.

3. Go to Settings -> System -> System Updates -> Click top right icon -> Local upgrade -> Click on the corresponding installation package -> upgrade -> System upgrade completed to 100%.

4. After the upgrade is complete, click Restart.

5. Phone will boot into recovery mode to format user data, it will reboot again after formatting.

6. Update successful.​

Note: This upgrade method will erase all the contents of the phone, please be sure to backup first.

1. Download the latest ROM upgrade zip package from the specified server.

2. Copy the Rollback package to the phone storage.

3. Go to Settings -> System -> System Updates -> Click top right icon -> Local upgrade -> Click on the corresponding installation package -> upgrade -> System upgrade completed to 100%.

4. After the upgrade is complete, click Restart.

5. Phone will boot into recovery mode to format user data, it will reboot again after formatting.

6. Update successful.​