How to Install TinyUmbrella on an iPad 4.2.1

TinyUmbrella is an application that allows you to save your iPad's baseband so that you can upgrade the firmware on your iPad device without also upgrading your iPad's baseband. This means that when Apple releases an update to your iPad's iOS operating system, you can upgrade your device without worrying about losing your jailbreak or unlock.


Instructions

1. Go to the TinyUmbrella home page on your PC or Mac computer.
2. Click the "TInyUmbrella" download link for your PC or Mac computer from the right side of the TinyUmbrella home page. Confirm that you want to download and install the software to your computer.
3. Double-click the TinyUmbrella icon on your computer to open the application.
4. Connect your iPad 4.2.1 to your computer using the iPad data cable
5. Click the "Start TSS Server" button.
6. Click the "Save SHSH" button to sync the TinyUmbrella application with your iPad device. TinyUmbrella will install on your iPad device and create a backup of your device's baseband on your computer.

Tips & Warnings: 
Jailbreaking your iPad will void the manufacturer's warranty.