A:AnswerThat depends of wich are the frequencies your future carrier works over. But an unlooked device should work perfectly no matter what. Send the country and carrier, and I can tell you.
A:AnswerI purchased the unlocked version online through Best Buy and purchased the Cricket Wireless SIM Card and a refill card. Got the great price, and the ability to go with any carrier. The unlocked phone is a CDMA and GSM friendly phone.
A:AnswerI believe this depends on your carrier if your talking about data usage or making calls. Unlocked phone just means if your carrier supports the swap of SIM cards to new phones you can upgrade your phone without letting your carrier know. Beware that this phone takes a Nano SIM card.
A:AnswerI bought an unlocked S9+ and put it on AT&T. So far so good. Everything works so far. I have had it for 2 weeks now. It comes with no installed AT&T apps, which i think is great! Hope this helps