Jailbreak 5.1 Released - Full Step by Step Guide

[the magic]

yes, you read it right! the great news for you jailbreakers, MuscleNerd ‏member of iPhone Dev Team has just stated that the iOS 5.1tethered jailbreak has been released to the public now. The iPhone Dev-team has just seeded Redsn0w 0.9.10b6 to jailbreak 5.1 tethered on iPhone 4, 3GS, iPod touch 4G, 3G and iPad 1.

Supported devices for iOS 5.1 Tethered jailbreak :
iPhone 4 (GSM – CDMA)
iPhone 3GS
iPod touch 4G
iPod touch 3G
iPad 1
Here are the Redsn0w 0.9.10b6 download links:
redsn0w 0.9.10b6 For Mac
redsn0w 0.9.10b6 For Win (be sure to run in Administrator mode
iPhone Dev-team has stated that about jailbreak 5.1 Tethered :

Update #1: First, please read and re-read the above warnings! With all of that in mind, we realize that some of you non-A5 jailbreakers are itching to get to 5.1, even though there seems to be no compelling new feature there. Because of geohot’s limera1n exploit, those with devices earlier than the iPad2 can test the 5.1 jailbreak waters if they really want to, using redsn0w 0.9.10b6. Here’s what you need to know:
This is a *tethered* 5.1 jailbreak for non-A5 devices. You’ll need to use redsn0w to “Just Boot” your device every time it power cycles, otherwise jailbreak apps won’t work (neither will Safari).
If you use ultrasn0w for your carrier unlock, be sure to use a custom IPSW to get to 5.1 first! Don’t ever restore to a stock Apple IPSW! Use redsn0w’s “Custom IPSW” button to create a NO_BB_* version of the 5.1 IPSW and restore to that instead of the stock one. (That option is available only to 3GS and iPhone4-GSM owners.) ultrasn0w itself will be updated for 5.1 in the next few days (same baseband support, not 5.1’s baseband).
If you’re lucky enough to have an old-bootrom 3GS, this jailbreak is actually untethered (redsn0w will figure that part out automatically).
While we were at it, we added @pod2g’s steaks4uce exploit to support MC models of the iPod touch 2G (whose last firmware was 4.2.1). So now redsn0w will auto-detect and jailbreak all versions of that older device.
iBooks won’t work until a future update of redsn0w

[ranaboby]

If you use ultrasn0w for your carrier unlock, be sure to use a custom IPSW to get to 5.1 first! Don’t ever restore to a stock Apple IPSW! Use redsn0w’s “Custom IPSW” button to create a NO_BB_* version of the 5.1 IPSW and restore to that instead of the stock one. (That option is available only to 3GS and iPhone4-GSM owners.) ultrasn0w itself will be updated for 5.1 in the next few days (same baseband support, not 5.1’s baseband).

To make it clear ultrasn0w 1.2.6 won’t be a new unlock for higher basebands, ultrasn0w 1.2.6 will bring compatibility with iOS 5.1 to unlock the already unlockable basebands.
Ultrasn0w 1.2.6 to unlock iPhone 4 / iPhone 3GS on 5.1 for the below basebands:

01.59.00
04.26.08
05.11.07
05.12.01
05.13.04
06.15.00

According to iPhone Dev-team, ultrasn0w 1.2.6 will be released within the few coming days. You will be able to download ultrasn0w 1.2.6 to unlock your iPhone 4 or iPhone 3GS from Cydia after jailbreaking on 5.1 using custom firmware (MUST be custom firmware), stay tuned.
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