Dear Friends,
I just realized downgrade iPhone 3GS from very late version, 6.0.1 to older version 5.1.1 via Ultrasn0w 9.15b, but I tstill have big problem on my device. Something is going wrong during unlocking this phone and it still continously searching and cannot detect the SIM card. If somebody is interested on downgarde procedure I can post here a step by step procedure, but I cannot guaranty you that this is worthy for you. If somebody have any solution for my problem (No SIM dedected, and out of service or continously searching without SIM card) please share on this forum. Any kind of help shall be much appreciated.
Best regards to all,
Fredi,