Gevey SIM Unlock iPhone 4 iOS 4xx, 5xx and 6xx

Step 1 – Preserve IPhone 4 Baseband If your iPhone 4 is running iOS 4.x.x and has any of these basebands: 01.59.00 / 02.10.00 / 03.10.1 / 04.10.1, make sure you update to iOS 5 using a custom firmware with preserved baseband in order to unlock with Gevey SIM. Follow this guide to preserve iPhone 4 baseband while updating to iOS 5:

  Step 2 – Jailbreak IOS 5 Now you need to jailbreak you iPhone 5 running iOS 5 with preserved baseband. To jailbreak iOS 5, follow this guide:

  Step 3 – Unlock With Gevey SIM

• After the jailbreak, your iPhone 4 should be activated. Setup the iPhone 4. Now:
• Go to: Settings > General > Network and Turn OFF the 3G
• Turn Off the iPhone Eject and reinsert the SIM card along with Gevey SIM and turn the iPhone ON

• When turned ON, The iPhone will begin Searching… for the network
• After Searching for a few seconds, following popup should appear, hit the Accept button
• Now wait for 15 seconds;
• Then dial 112 and hang up after 2 seconds. The call does Not need to connect;

That’s it! If the process fails, reboot, reinsert SIM and retry. Enjoy your unlocked iPhone 4 on iOS 5 with gevey SIM. *** Remember that, on every reboot, you’ll have to repeat the GEVEY SIM process (Step 3) to get the signals back.