1. Click to download the firmware (remember to select the corresponding version), which is what we often call the update.zip file.

Firmware website: /firmware

2. After downloading, connect the mobile phone with the computer through the data cable;

▲ (After the connection is successful, "Connect as a media device" will appear in the drop-down notification bar of the mobile phone; At this time, double-click the computer "Computer" and "MX4" will also appear under "Portable Equipment". Similarly, the corresponding display will appear for the corresponding model. )

3. Right-click the update.zip file on the computer and send it to "MX4" (similarly, the corresponding model will be displayed accordingly).

4. Go to the "Documents" on the mobile phone desktop, find the update.zip file, and click "update.zip", and the mobile phone will automatically enter the upgrade interface.

(Users who have been ROOTed, installed security software and patched Android signature vulnerabilities, please be sure to clear the data when upgrading, otherwise they may not be able to root. Clearing data will lead to the loss of personal data such as contacts. User data includes all mobile phone contents except storage disk data, such as contacts, short messages, applications, etc. Please synchronize the backup. )

5. During the update process, the firmware will be verified first, and the "upgrade" will be entered after the verification is successful. In a few minutes, it will return to your familiar interface.

6. After entering the system, click the "System Upgrade" icon on the desktop to view the current version number. If it is the same as the downloaded firmware version number, congratulations, the upgrade is successful!