Here are four potential grammar mistakes in the text:
1. "She don't watch" should be "She doesn't watch".
2. "she haven't got a phone" should be "she hasn't got a phone" or "she doesn't have a phone".
3. "She play football" should be "She plays football".
4. "she eats lots of chocolate" - While grammatically correct, it could be improved for flow depending on the intended emphasis, but it's not a definitive mistake.