What's the most you would spend to fix an iPhone Xs with 512gb? I'm in South America and my US warranty was voided, or they ended it after a year. It needs new front glass, and has problems with the telephone volume and bluetooth. I just posted about the latter 2 issues. Apple phone support wasn't able to help and I'm taking it in for service tomorrow, or at least to get an estimate. It is in good condition otherwise, i.e., no dings.