I had a family member buy a 3gs 06.15.00 ios 4 in Pakistan with no ultrasn0w or anything installed. I was told it was factory unlocked. They gave it to some guy to load ios 5 on it and i am told it didn't pickup any signal so they loaded ios 6 instead. Currently its jail broken with no ultrasn0w and it is seem to be working fine (atleast what i am told). Also the shop guy who loaded ios 6 on it said to turn on airplane mode and than turn it off and turn it on with airplane mode on to "prevent any signal issues" Now is this true?? sounds like bull ****. Currently its 06.15.00 with 6.0.1. Is this possible?