how can I unlock S55

hi, I would like to know han can I unlock a S55, I have siemens Freia and
original serial data cable, but I can not unlock, what I have to do?
any help I will appreciat

Regards
Aldevan

search for siemens testpoints.

You have to desolder a resistor. If you want to use easy testpoints you need to buy Martech II.

With best regards,

also...freia dont work with original cable..U need chinese one...
Regards!
Sergo_Zmeia

hi sergo_zmeia, Do you have or know a website with diagram schematic for this serial cable?

sds, Aldevan