I got my 5S stolen Thursday and today it was back online in Find My iPhone.
First, I would like to know if there's a way to know if the iPhone is in locked mode or not.
Next, from the time it got back online, the iPhone name has changed. Since my iPhone is password/fingerprint locked, and in locked mode, how can the person who (certainly) bought the stolen phone change the name. He can't go in to Settings, can't access it via iTunes, and even if he restored it he can't activate it because of the iOS7 protection requesting my Apple ID password (am I right on this?). My first answer would be a DFU reset from a previous backup but i would like confirmation about it and other possibilities.
On top of this, when going into locked mode, I'm unable to set a different code than the one already on the device which may be a problemat if the code is the one set by the guy when he did his backup from another iPhone and he re-injected into my phone with a DFU backup reset. How can I set another code to be sure he can't use the phone?