What does the 2 stand for in "iPhone (2)" in find my iPhone app? Under the 'Find my iPhone' app, one of our phones listed now has a 2 beside it:
iPhone (2)
Listed like the above. What does that mean?
It means you have two devices using the same name. It has to do something to try separate them, so it adds a (2).

This can also happen if a single device is restored or set up as a new device, but is actually the same one. The initial device is preserved but a new one is set up to attempt to differentiate.