Did you install iOS 7 because you did not want to wait. Well, in that case, you should make sure you do not loose your phone or get it stolen. The reason is a quite preoccupying and basic security flaw in iOS 7 that allows to bypass the lock screen.

This flaw was found by a Spanish soldier, who posted a video on YouTube to prove it. Now Apple representatives say they are working on fixing it.

You can read more about it in La Vanguardia (news in Spanish).

By the way, note that the flaw affects every type of device able to run iOS 7 *except* the new iPhone 5S.