A:AnswerTo my knowledge, Best Buy only sells one model number of the unlocked Note 8. Other model numbers may be available from other sources. See attached from Best Buy website.
A:AnswerIf you get the factory unlocked it will work with any simcard in the world. Mine has worked with 3 different carriers both in Mexico and the USA.
A:AnswerMine came with a SIM card for Boost Mobile. I did not try it out as I immediately put in my SIM card from a different AT&T phone. Contact Sprint for how much a SIM card will cost you. But you can get one through Sprint.
A:AnswerI have an unlocked Note 8 using t-mobile network and works fine with wifi calling. Not sure if it will work with other network since I have not tried them.
A:AnswerYour question appeared under questions for the Galaxy Note 8, but here goes. The only way I know to make payments on an unlocked phone is if you finance it with a Best Buy credit card if you qualify. See attached.