Program MC8790

Hello. I receive my MC8790 to upgrade MC8775 and it can’t find 3G net.
Maybe I should upgrade firmware? How can i do it?

I don’t think you should go upgrading firmware just on a “maybe” - you need to be certain, first, that it is actually required!

As you say you’ve only just received this device, then isn’t the obvious first thing to contact your supplier??!