Do you have iPhone 4S with Jailbreak? If search info about how to remove jailbreak iPhone 4s – you must read this post.
UNJAILBREAK IPHONE 4S – HOW TO REMOVE JAILBREAK IPHONE 4S:
Unjailbreaking can be done simply by restoring your iPhone 4S with iTunes 10.5.x. Unjailbreaking iPhone 4S removes any trace of it jailbroken and deleted all the jailbreak files. You can unjailbreak your iPhone 4S when you are having and performance issues or want to go to the Apple Store to get the phone repaired / claim warranty etc .