Restoring Factory Settings
Restore factory settings if your device crashes or is slow to respond.
Restoring factory settings will erase your personal data from your device, including account information, downloaded apps, and system settings. Back up important data on your device before restoring factory settings.
1. Open 
Settings.
2. Touch Advanced settings > Backup & reset.
3. Touch Factory data reset and choose whether to format your internal storage.
Selecting Erase internal storage will delete all files on your internal storage, such as music and images. Proceed with caution.
4. Touch Reset phone to restore your device to its factory settings.
Questions about your Huawei Mate 10? Post in the comments!
Huawei Mate 10 Manual [PDF]