It seems that most Samsung phones are locked down in the US. Other models have no issue besides KNOX tripping. KNOX tripping only disable some features you pro

It seems that most Samsung phones are locked down in the US. Other models have no issue besides KNOX tripping. KNOX tripping only disable some features you probably won't need unless you have a corporate phone, and you probably shouldn't mess with these anyways. At least in Europe, tripping KNOX doesn't void your warranty.