Please forward this question to someone who knows the answer.
Who can I ask?

I have an activated working RAZR V3m.
Firmware NEWC_01.05.0A

It does not recognize many AT commands only a few. The rest return ERROR instead of OK.

Which firmware version (that I can upgrade or downgrade to) supports most AT modem commands via USB?

How do I flash the phone? At a local Verizon store?