Firmware upgrade can optimize some functions of the machine, improve the mobile phone system, and make the mobile phone system more stable and smooth. Supplement: The specific operation method of upgrading and updating the system can refer to the following introduction:
It is recommended to use Fota to upgrade the mobile phone firmware/system online. Please operate: Settings-System Update-Download Update Manually/Download Update Automatically (Software Update/System Update-Update).
Please note when upgrading firmware:
1. Before upgrading, please back up the data in the device to avoid data loss and irrecoverability.
2. If the system prompts "Daily download limit is reached", it is because the time-sharing update method is adopted to ensure that the server can bear it. Please try again later.
3. The mobile phone needs to be set to the current time.
4. The mobile phone is fully charged (above 50%).
5. The mobile phone needs enough storage space (at least 1GB USB memory).
6. Ensure the stability of the network environment (the updated version of the system/firmware is relatively large, which may consume a lot of traffic. It is recommended to use WLAN to access the Internet when upgrading).
If you can't upgrade normally through the above methods, it is recommended to bring three-guarantee vouchers and send the mobile phone to the local service center for security upgrade.