If your iPhone 4 after Jailbreak and unlocked gives you an error message of Different Sim detected ( Please connect to iTunes) and asks for emergency mode, this ie because the loophole of using Phonebook SIM card to activate iPhone is patched (fixed by hooking the activation wildcard ticket to the ICCID of the used sim )but there is a patch to fix this too. Thanks to GSM Lord to provide this solution all iPhone 4 users who have used JailBreak Me to unlock their phone.
Follow these steps :
- Download ifunbox software from here
- Run software and sync with phone.
- Now go to /private/var/root/Library/ and delete orginal lockdown folder and put attached lockdown folder
- Restart your iPhone 4.
- The error should be gone.