A tweak has released for the jailbroken iPhone, iPod or iPad devices users naming as RecoveryGuard. It is a Cydia app that prevents you from accidentally updating iPhone, iPad or iPod. Some people just push the update button in iTunes accidentally. Some people are curious to see what happens if they press it. For some its an adventure.
RecoveryGuard is a Cydia app under the Pushfix repository. It will prevent you from updating your iPhone, iPad or iPod Touch. The app is currently in its beta version. It helps you protect from updating iOS 3.1.2 through 4.2.1 versions. The tweak makes your iPhone software thing that your device is already up to date.
RecoveryGuard also helps you prevent from going into Recovery Mode (Connect to iTunes screen with cable). Although you can still go into DFU mode by holding power and home button for restoring and jailbreaking purposes. It just helps you if your device is stuck in the recovery mode.