Service cable pinout for Siemens

[mosfet666]

I've searched high and low and haven't found a working service datacable schematic. Anyone have a known working service cable pinout/schematic? The phone I'm working on is an AT&T A56i.

[reda_guellil]

Maybe this would be helpful
pinouts from the siemens A50
1- GND, 2- SB, 3-POWER, 4-NC, 5-TX, 6-RX, 7-CLOCK,
8- DATA, 9- GND MIC, 10- HF MIC, 11- AUDIO, 12- GND AUDIO

[hessian14]

Hi!
As far as I know you will not be rewarded by success with only the right cable.
The A56i is the Go-phone, correct?

The friendly AT&T people had a hardware addition made to that phone to resist software SP lock removal.
That means opening it and cutting a lead inside the phone that is the width of a hair right next to other vital parts.
So unless you have a steady hand and are not afraid of losing the phone altogether, go ahead.

I had run into the same problem and a friend took care of it after way too many hours of research.