z750a to z750i flashing... please help!

[rando191]

Hello!

I'm brand new to this and very desperate at the moment...

I got my hands on a pre-release z750a with r1b AT&T (Cingular) firmware on it. Phone works.... alright, but it has it's obvious problems since the firmware is so early and branded.

Anyways... how do i reflash this z750a to a newer z750i firmware? The hardware is identical if i'm not mistaken, but every time i connect the phone to the client, it detects the phone just fine, but either gives me an identification error, or lets me pick custom or update firmware, i never get the option to choose any firmware to flash tho...

Is is possible to force flash the 750i firmware? Please help!