Android SBC with mPCIE modem only connecting to 2G

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Question:
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?

Thank you


Answer:

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