Update Another update to Ultrasn0w is out. This unlocks the iPhone 4 as well as 3G/3GS basebands 04.26.08, 05.11.07, 05.12.01 and 05.13.04.
iPhone 3G users who rely on Yellowsn0w to unlock and use their iPhones can now enjoy the iPhone OS 3.x using Ultrasn0w. While we have already used redsn0w for Jailbreak, to get Ultrasn0w you just need to:
- add the repo repo666.ultrasn0w.com to cydia or icy
- Search for ‘ultrasn0w’ in cydia or icy and install it
- Reboot your iPhone 3G and done!
Note: T-Mobile USA users should disable 3G before using ultrasn0w
We haven’t tested this yet, but here is the official announcement.
If you want simple instructions
1. Use Redsn0w to Jailbreak
2. This will give you Cydia. Now use ultrasn0w as directed above
Update: “Ultrasn0w’s latest version also unlocks the iPhone 3GS uptill firmware version 3.1.2, but only the ones running baseband v4.26 unlike the blackra1n which unlocks all”