I jailbroke my iphone4. I edited the fiel inside CoreServices and change the ios version from 7.1.2 to 8.1.2. Within a couple of days, all apps starting disappearing instantly after opening. Apps are there. I can also get notifications but when I click on the apps, it stays for 3 or 4 seconds and then goes off. I tried to restore through itunes but it shows error, and even tried to re-jailbreak to get it fresh or maybe get rid of jailbreak. But the computer says the iphone with that version of iOS is not compatible. So, I can neither restore nor unjailbreak. I can't even edit the iOS version because i can't open ifile anymore. Any solution?