I think I'm going to break my friend's phone while we are wrestling
Are you upset with him for some reason?
Yes, he never lets me win and that makes me angry
It does feel bad not to win but breaking things is not the answer. Not only will you have to pay for the broken phone but you could also lose the friendship.
Nah, it's fine. I'll pay for it if it does break.
That's wonderful you'd be responsible if you happen to break it, but wouldn't it be best to not even try in the first place? Phones are expensive, and it may be really precious to him. So how would he feel if he didn't back it up and all of his things were lost?