I have an Android SBC with a ZTE MF210v2 modem. The modem is 2G and 3G capable and the frequencies match our local mobile networks in Australia.
However the modem only works with 2G capable SIM card. I cannot get it connected on 3G simcards/networks.
I have specifically selected ‘3G preferred’ in the device settings.
I have access to the source code on this board. Can anyone advise where I should be looking to determine the modems configuration in relation to 2G/3G etc? The board is from China so the bands/frequencies might be hard coded incorrectly?