My girl thew my phone really hard and now my phone won't turn on at all how can I fix it IT'S A ZTE MAX XL

Not sure what you are asking, how to fix a phone that was physically damaged or trying to buy an iPhone 7?
If it was thrown, need to replace it. If you want an iPhone, look around in the same places as always, your service provider, ebay, craigslist, local shops.