Just bought a semi tether iphone 4 running on ios 5.1. I just found out that the phone is a semi tethered jailbreak when i restarted the phone. The phone starts up fine and everything works other than cydia apps and safari.I just want the phone to start working again. does anybody know what the easiest way to fix this problem i have ? should i restore/ or upgrade to 5.1.1 from itunes or just re jailbreak.