Hi Experts, I have an AT&T iPhone 3gs with ios 6 and baseband 05.16.07 and having serial number xx201xxxxx I am out of the country right now and need to use another sim on it anyway to unclock the phone? I tried all available options but the ultrsn0w fixer is not available for baseband 05.16.07 and cant downgrade baseband as phone manufactured on 2012 week 1. Basically I am stuck dont have the shsh blob and when i checked with TinuUmbrella i saw 4.1 and 6.0 blobs, tried to downgrade to ios 4.1 with help of 4.1 blob but unsuccessfull... anyway I can get my phone unlocked? Please help me out guys. thanks.