Frequently Asked Question

Firmware Revision:

1. A bugfix to remedy sending DTMF tones 
2. Modify the validitation of the config Id. When entering configID, If no # termination is entered within 5 seconds, the phone should accept the ID already entered .
3. Automatically detect whether the MAC address has been modified at startup, and use MAC backup to restore it if it starts with incorrect MAC starting with 54.
4. Detect if the environment variable is corrupted at startup, if it is corrupted, it will be restored automatically.
5. Backup the MAC address when the phone starts.
6. bootloader.img file is used to fix the bad CRC when uboot boot and restore the default environment variables caused by the situation

Always check which model of phone you have and which prefix it requires.