Wednesday, March 9, 2011

iPhone 3GS 4.2.1 Untethered Jailbreak

Follows the steps below to perform an untethered jailbreak for the iPhone 3GS ver 4.2.1. This is needed such that you do not

have to connect to computer each time you power off and restart the iPhone.

  • Download Greenpois0n
  • Connect iPhone to computer and start the Greenpois0n. Follow on screen instructions to jailbreak the iPhone
  • Restart the iPhone. Now the phone should start up normally without need to connect to computer.

Tuesday, March 8, 2011

How to restore iPhone to a specific firmware version

If you like to restore iPhone to a specific firmware version rather than the latest version. Here's how you can do it:
  • Download the iPhone firmware here and save it to desktop
  • Start iTunes. Connect your iPhone to the computer and enter DFU mode on iPhone (Watch instruction video here to enter DFU mode)
  • Hold Shift and chick Restore button in iTunes. It will prompt for a firmware. Browse and choose the one saved on desktop.
  • Now sit back and wait for iTunes to complete the restore process.
  • If the restore is sucessful. You are done here. iPhone will show the "Connect to iTunes"/"Emergency Call" Screen.
  • Sometimes iTune restore will end with an error 1015 or 1013. This is because the baseband are not downgradable. iPhone will be stuck in the recovery mode. Follow the steps below to get it out of recovery mode and boot up normally.
  • Download TinyUmbrella
  • Start TinyUmbrella with iPhone connected. Choose the iPhone and click "Exit Recovery"
  • iPhone will reboot normally and will show the Connect to iTunes"/"Emergency Call" Screen after reboot.
  • If you use AT&T you may activate the phone with your AT&T sim card. If you use T-Mobile or other carriers, you will need to continue to unlock the iPhone here.

Tuesday, March 1, 2011

How to enable MMS on Unlocked iPhone 3G/3GS iOS 4.2.1

  • Launch Cydia on iPhone
  • Go to Manage -> Source and add source
  • Install package T-Mobile US  MMS Fix for iOS4
  • Install package APN Editing
  • Now go to Setting--> General --> Network and disable 3G
  • Go to Cellular Data Network and set the following:
    MMS Proxy: 
    MMS Max Message Size: 1048576 
    MMS UA Prof URL: 
  • Restart the iPhone and you are done