Warning: Jailbreak at your own risk. Please exercise caution and read the comments, as these jailbreak instructions are not guaranteed to work.
How to Jailbreak Verizon iPhone with iOS Version 4.2.10 Using Redsn0w.
Update Aug. 15, 2011: Many commenters have noted issues with this jailbreak. Please be patient as we attempt to diagnose the problem.
Note: To jailbreak another iPhone version, visit my comprehensive article on how to jailbreak an iPhone.
This tutorial contains jailbreak instructions for both Windows and Mac users, using Redsn0w.
Warning: This is a tethered jailbreak, which means that you will need to redo the jailbreak each time your iPhone reboots (you will not lose your data each time.)
Windows & Mac Users
Required:
- Verizon iPhone 4
- Firmware: 4.2.10 (check your version in Settings » General » About)
- iTunes 10.4
- Download iOS 4.2.9 IPSW (iPhone 4 (Verizon)) — Update: Windows users must rename the .zip file to .ipsw in order for it to work.
- Download Redsn0w 0.9.8b4 (Windows or Mac)
Jailbreak Instructions
1. Open Redsn0w, click Browse and select the iOS 4.2.9 file that you previously downloaded.
2. Click Install Cydia and hit Next.
3. With your iPhone off and the USB cable plugged in, click Next.
4. Follow the on-screen instructions to put your iPhone in DFU mode. Your iPhone will restart and be fully jailbroken.
5. Note: This is a tethered jailbreak, meaning you will have to redo the jailbreak each time that you reboot your iPhone. To do so, simply click the “Just Boot Tethered Right Now” option in Redsn0w.
Was your jailbreak successful? Please post questions and suggestions in the comments.