@ Himem
use atached file (dos version of siemens contrast tool ). Start if with phone on and conected to com1. write 45 or similar and then pres F1 to save settings. Restart phone and it will be ok. If not vrite 50 and F1. Good luck !
P.S. Rename file to contrast.zip .
Attached Files Contrast.zip.txt (28.6 KB, 449 views)
thanks for solving my problem