Its called search my iPhone and should be pre-installed. The app itself is self-explaining. Just enter your AppleID and you are able to track it with your other apple devices with that AppleID.This is also good if your iPhone is stolen, because the thief will get stuck on trying to find out the code and the waiting time grows, reset via iTunes isnt possible without code. So it is just worth the price of its material, he can only sell it on eBay asbroken. But of course you should/have to remove this when you sell the phone.
I had an issue with the camera, its known that a certain batch has been reported as defective, butmy phone just for not being part of that batch even though it is presenting the same fault could not be fixed as part of the quality plan that triedto solved this issue. Does anyone have this same problem? The specific problem is: The camera looks blurred but the slow motion mode looks perfectly fine, I think is more a software issue.