Improvement Point: Cancel Bluetooth notification sound
1. Download the Binary file in the root directory of the USB flash drive;
①. Use an empty USB flash drive, USB format: FAT32, 128GB or less capacity;
②. The file name must be spupdate.bin;
2. Insert the U disk, automatically switch to the USB source, and long press the surround left button, as shown in the right picture button 1;
3. After the update is completed, it will automatically restart;
4. Press and hold the Surround stone key for 5 seconds, as shown in the figure below, button 2, version number T20, indicating that the upgrade is successful.
- spupdate.bin4 MB