What's better, a jailbroken iPhone 4S with iOS 6 or the same with iOS 9 (again, jailbroken)? The constraints are iPhone 4S, and no other iOS (firmwares no longer signed by Apple). The concern is performance issues (9 on a 4S) vs loss of features (6). There may be other considerations you know about that I don't, so please share. If iOS9, i think there are two versions that have available jailbreaks. Is one better? The most recent? I have been sufficing with a 16GB 8.1.2 (after my original 64GB was stolen), jailbroken, but recently got another 64GB phone of the same model that I'd like to start using but it is still on 6.something and I successfully jailbroke it. But does 4S do OK with iOS 9? I read negative things but not that its non-functional. I don't use my phone for anything special: just safari, phone, messages, WwFriends, camera, and I prefer to jailbreak. I already miss the swipe-up menu where I get the flash light. If I go to iOS 9 there is no reversing it to 6 (or going to 8.1.2 which I'd do if it were possible). I wasn't crazy about the look of iOS8 and liked how things were before but I'm kinda used to 8 and learned to like it. I'm not ready to move on from 4S; I like it. Will keep until it dies or phone 8 comes out, whatever happens first. Another way to put the question is: will the performance of iOS9 on a 4S be so bad that iOS 6 is better by comparison? What would you do?