If you have upgraded your iPad 1 to new iOS 5.1 you already have lost your previous jailbreak and all jailbreak apps, if it was jailbroken. Or if you want to upgrade to 5.1 version and use the jailbreak apps you can follow below step-wise jailbreak guide.
Remember this is a tethered ios 5.1 jailbreak and we are still waiting for untethered 5.1 jailbreak which I hope will be available with in few weeks as stated by pod2g. Tethered jailbreak means, whenever you need to restart/reboot your iPad you will need a computer to boot it using the RedSn0w 0.9.10b6.
Below is the guide on How to jailbreak iPad 1 iOS 5.1
Step 1: Download latest version of RedSn0w 0.9.10b6 by Clicking below links:
RedSn0w 0.9.10b6 For Windows
RedSn0w 0.9.10b6 For Mac
Step 2: Extract the zip file and run the RedSn0w.exe file to start the redsn0w jailbreak process.
Step 3: There are two buttons “Extras” and “Jailbreak”, click the first button Jailbreak to jailbreak and install Cydia
Step 4: Connect your iPad 1 into the computer using the USB port. Read instructions on below screen and make sure that your iPad is OFF before clicking the Next button.
You can see on the screen that this jailbreak is also compatible for iPhone 4S and iPad 2 but remember if these are having iOS 5.0.1 and if having iOS 5.1 then it is not compatible.
Step 5: Now you have to put your device in DFU (direct firmware update) mode, just follow the RedSn0w screen instructions and you will do it, if you feel difficulty you can visit this post on How to put your iPad in DFU mode.
- Hold down both the Home button and the Power button for 10 seconds.
- Release the Power button and continue holding the Home button until RedSn0w detects the device.
Step 6: Just observer the screen message and let it complete until next input screen comes.
Your iPad will now reboot to identify the build.
Now RedSn0w will prepare the jailbreak data.
Step 7: On next screen check Install Cydia from the list of check box options and click Next.
Step 8: iPad will now reboot and RedSn0w will build the jailbreak process and upload ramdisk. The remaining part of jailbreak will take place on your iPad and you can see the RedSn0w icon on the screen with progress bar. After completion of this jailbreak install the iPad will reboot and will have Cydia installed. Now you have to boot it using RedSn0w before you can use the Cydia and Safari.
Step 9: Boot Tethered iPAd1 : Again start the RedSn0w and Select Extras this time.
Step 10: Select Just boot from the Extras menu to just boot tethered right now. The iPad 1 will reboot and now it is tethered jailbroken. You can run Cydia now. Just tap the Cydia icon on your springboard and if it loads it means your jailbreak is successful. If Cydia is not running try reinstalling again from step 1.