So you used purplera1n and jailbroke your iPhone 3GS but you still see the emergency screen huh? We just have to hacktivate your iPhone and then we can unlock your iPhone using ultrasn0w!
Lets get started :
1) Make sure you used purplera1n and jailbroke your iPhone 3GS. If you see the Emergency calls screen, you may follow the next few steps.
2) Download this lockdownd file.
3) Download iPhoneBroswer for Windows. You may try PhoneView for your Mac.
4) Launch iPhoneBrowser and navigate to usr/libexec folder as shown in the picture below. (If you …