If you want to perform jailbreak own iDevices in the near future, then it would be good to know that version 1.2 a pangu jailbreak is available for download. According to the changelog provided by the developers of the jailbreak solution, version 1.2 brings for us the solution to the problems regarding boot loops on iPhone 4 and iPhone 4S, they included the afc2 package that allows accessing system files via USB and solved other operational problems .
Fix boot loop bug for some iPhone4/4s.
Fixed sandbox log issue.
afc2 is included now.
Add patch for task_for_pid.
Add notification if jailbreak fails.
If you have already jailbroken using Pangu, then it is not necessary to repeat the procedure, but if you do in the future, it would be advisable to use this new version. Pangu 1.2 is available for free download in this page, and you can find the jailbreak tutorial with a simple search in iDevice.ro.
