Update Firmware SC600

Hi, I am using evb g2. I would like to know if a firmware update is available. If available, how do I update?

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Second question, why can’t I activate the engineering mode through the AT + QENG command?

You could use QFIL to update firmware, and what is AT+QENG response ?

When I run the AT + QENG command, it returns error.
why the command doesn’t work? Is it due to the failure to root the phone?

I also ask if you could pass me a newer firmware if available!!!

can you help me? We got stuck in development activities

pls add my skype live:76530067, let me send you , if command response is error, it is not supported