Someone has to learn something about trust

Well I'm glad you found out now instead of later. Have a nice long chat with him about respecting your privacy. And maybe turn location services off, just to be safe. But, hey, new Iphone!

See Op Run. Run OP, run.

"Everyone on the planet" is not cheating (though OP's boyfriend might be). However, people do tend to project their own values, standards, and morals onto everyone else, meaning they generally assume other people will think and act the same way they do. Have you ever heard the saying "a thief believes everybody steals"? This is why you get cheaters accusing their (faithful) partners of cheating in the absence of any evidence. On the flipside, this is the same reason so many "nice" and honest people are so easily taken advantage of- they literally don't see it coming.

Don't let him know you found out. Pass the phone to a friend to pass to a friend to pass to a friend. All day. All over the city/town/school/etc. Make sure it spends the night at a male friend's house. All is fair in Obsessive Possessive Stalking.

That's a massive over-exaggeration 72. There are many, many, many people on the planet who would never cheat.

My ex girlfriend tried to do this. Except I'm the one that bought the phones.

You two need to have a serious talk. If you've done something to betray his trust in the past, then you completely and utterly deserve this, it is the price you pay for getting back together again. However, if you did nothing of the sort, he needs to back off. I get that trust is earned not given, but you have to give a little to start out.

this kind of behavor is what ruins relationships. unfortunately it usually is a really long drawn out relationship death.

Also, unless he told you that, tracking someone without their permission is now illegal.