How to Activate your iPhone Without SIM (iOS 5.1):
- Eject your SIM card of the SIM tray and put the empty tray back to the iPhone.
- Download iOS 5.1 firmware for your iPhone and Redsn0w 0.9.10b6 (Windows) Redsn0w 0.9.10b6 (Mac) - download link here
- If you’re on Windows 7 run Redsn0w in Windows XP compatibility mode and as administrator (right click on Redsn0w icon to enter these options).
- Launch Redsn0w, click Extras, choose Select IPSW and specify the path to your iPhone’s IPSW you’ve downloaded earlier. Hit ok, choose your bootrom (3GS only).
- Hit back and go to Jailbreak menu.
- Within Jailbreak menu choose only Install Cydia box and leave all the other empty.
- Put your iPhone into DFU mode: hold down both the Power and Home buttons simultaneously for 10 seconds. Release the Power button but keep holding the Home button for 10 more seconds. If your screen is black, you’re in DFU mode. If an iTunes logo is displayed, you’re in Restore Mode: just try the steps above a few more times, sometimes it doesn’t go well on the first try. Nonetheless, a notification will be displayed if you’ve managed to enter this mode correctly.
- After that just put your iPhone aside and wait for the process to finish (it may take 5 to 10 minutes).
- After jailbreaking and installing Cydia hit back and go to the Extras menu again.
- Select your IPSW, choose bootrom.
- Hit Just boot tethered now button in Extras menu.
- Put your iPhone into DFU mode one more time (see step 7).
- Wait until things get done (you’ll see a pineapple logo on your iPhone’s screen, that’s ok).
- Now just set up your iPhone. No SIM card message will be displayed this time.
- Enjoy hacktivated SpringBoard.
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