I got a iphone 3gs with iOS5 installed. I tried jailbreaking & updating to ipad baseband. Cydia failed to install for some reason. I tried jailbreaking by using redsn0w again. It was stuck this time. I updated the OS, now it says SIM is not installed. What can I do in this situation? I am using redsn)w 0.9.9b7. I am using my macbook pro. I should unlock this phone, as I want to give it to my dad who will use it overseas.