Install 3.1.3 Only Apps On iPhone Firmware 3.1.2 Using Cydia Tweak
In case you have not updated your iPhone firmware to the latest 3.1.3 version, you will be unable to install some firmware 3.1.2 only apps from the App store. Also your iTunes continually keeps bothering you with messages asking you to update your iPhone firmware. You don’t have to put up with these annoyances any more. There are Cydia tweaks which fake firmware 3.1.3 on 3.1.2 devices.
Here is yet another such clever Cydia tweak, called Firmware 3.1.3, which fakes your iPhone’s firmware, and makes iTunes believe that it is 3.1.3, when actually the firmware on your device is still 3.1.2. It does this by changing the system file which contains the firmware version.
In order to install this free app, launch Cydia, search for ‘Firmware 3.1.3’ in the BigBoss repository.