We have warned how using iPhone in-built "Erase all content and settings" option on a jailbroken phone can result in a infinite boot-loop, and also suggested the free Cydia package to tackle the issue of "erasing iPhone address book" on a jailbroken phone.

Free iTunes AppStore utility "My Contacts Backup" can not only "Backup and restore" your Apple iPhone contacts but also allows you to wipe the address book clean in a single shot.

There are software's tools to crack PDF passwords and unlock PDF restrictions, now there is a dedicated hardware and software combination to tackle the issue. Named "BeagleBone" the specialized "PDF password cracker" is a dedicated solution consisting of embedded Linux and a 700 MHz ARM processor, you simply need to insert a thumb-drive having the encoded/locked/password-protected PDF files and click a button to start the cracking process. In it's current form the "BeagleBone" uses a single ARM processor to brute-force crack the password by trying 6000 four-character passwords per second, but the interesting part is - multiple parallel ARM processors can be used to achieve faster decryption.

Apple iTunes does not allows a user to create an "Apple ID" from iTunes without specifying a payment method as shown below - add to that the coupon trick shared earlier does not work anymore. However, with a simple trick we can still get the "None" payment option and complete the registration process to get our free "Apple iTunes Store ID" which can be used to download and install all the free apps, games and music from the AppStore.

After giving users Corona - The untethered jailbreak for A4 CPU based Apple device running iOS 5.0.1, pod2g has achieved another milestone by jailbreaking the newer A5 CPU based devices like iPhone 4S and iPad2. For now a video is posted demoing working iPhone 4S jailbreak running iOS 5.0.1, there is no ETA provided for the public release but an release is expected soon.