I have a jailbroken iphone 4s running 4.(something) and I was wondering how/ how difficult it would be to update it to ios 6.1.3? And technically keep the jailbreak if possible. If not then what to use to back up my cydia apps. Assuming i can't keep the jailbreak, Is it as simple as downloading the ipsw and alt + right clicking update/restore the phone and clicking on the ipsw that I downloaded? Thanks in advance