CI820V1 upgrade firmware
The factory's original CI820V1 2.2/4 firmware version is damaged, and the factory warehouse only has one CI820V1 2.2/3. Can we replace it directly? Or can you upgrade the firmware from 2.2/3 to 2.2/4? Do I need to download the firmware? Where can I download this type of firmware? Anybody know how to do that? . Thank you very much!