Huawei Mate 8 - Manual (Page 163)

Backup and restore
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When updating, ensure that your phone has at least 20% battery power remaining.
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After updating, you may find that some third-party apps are incompatible with your
system, such as Internet banking apps and games. This is because it takes some
time for third-party app developers to produce updated versions for new Android
releases. Please wait until a newer version of the app is released.
To view your phone's version number, touch Settings > About phone > Build number.
OTA updates
When a new system update is released, you will be prompted to download and install the
latest version. Select OTA update for quick and secure updates.
Ensure that your phone is connected to the Internet before updating. Connect to a
Wi-Fi network before updating to avoid incurring data charges.
1
Open Settings.
2
Touch Updater. Your phone will automatically check for updates.
3
Select the latest version to download the update package.
4
Once the download is complete, touch Restart and update. The update process may
take a while to complete. Do not use your phone before it has finished updating. Your
phone will restart automatically when it has finished updating.