My phone got lost, someone must have found it, now it's turned off, and my only hope left is that it pops up on "Find My iPhone", so it locks itself with a new code for good, and the "finder" receives my message to contact me about rebuying the phone. Considering human nature, the finder will try to factory reset the phone (if did not already), which will kill all my chances to locate it.
So could the set but not required passcode prevent this?
View the Correct Answer passcode required to factory reset 4S if passcode set but not required to use phone in general in Ask iPhone Question , Answer Basics iPhone Question