I have three BV5800 devices. They came with Android 8.1.
I need to change the APN settings to make them work with our carrier's network.
But the APN settings only show pre-configured options and there is no "Add" nor "+" button.
If I long press on an existing APN configuration the settings are grey and I cannot change them.
Our carrier has suggested downgrading to Android 8.0.
Will this help?
Do you have a ROM image which would let us keep the same functionality?