A:AnswerI imagine that depends on your phone service. Mine is compatible with T-Mobile and my service is unlimited North America. The unlocked phones come from different countries and Samsung does not provide a warranty on them. I utilized Best Buy's plan instead. As long as the phone is compatible with the plan, you should be fine, but check first with the carrier. We called T-Mobile with the model number prior to our purchase.
A:AnswerWifi calling is a setting on the J7. Turn it on and pair it with your Internet provider and you can call from it. I have T-Mobile service and, as long as the phone comes with the option, it will work.
A:AnswerThank you for your inquiry. This device is compatible with most GSM networks which means that it won't be compatible with Verizon who traditionally operates a CDMA network. We appreciate your interest in this product. Thank you for your time!