I'm sure this has been asked before and I have googled this and can't get a straight answer. I have an jailbroken iPhone 5 that is using iOS 6.1 and I would like to update it to 6.1.2 and keep it jailbroken. How would I go about doing this? Do I have to completely restore my device then jailbreak it again or is there a better alternative? Also is it even necessary to update to the current iOS? Is there anything that could help the performance of my phone in the update like longer battery life or security fixes?