A:AnswerI’m sure best buy can give you a more thorough answer but when i bought this they told me that it can be used anywhere in north america only. If you are using the same sim internationally, your network carrier will determine the limits of using this abroad. However if you are asking if a sim outside the north american continent can be used with this phone, i was told it was not possible. The truly unlocked iphone can only be bought at apple. Unlocked phones from retailers still have limits. I suggest chatting with a best buy rep for better info but this is a tidbit from my experience, just in case anyone also needs to know.
A:Answerif you bought it unlocked it supports any carrier. all you will need to do is get a sim card (nanosim) from the new carrier and swap them out. this should retain your number as well, and as you aren’t changing phones, you won’t even need to transfer date. (back it up to cloud or computer prior to doing it anyway.)
A:AnswerYes, when purchasing the phone you can take it to your Cricket store and they will give you a new sim also can you help you transfer your data.
However, if your current phone uses a nano sim you can just take that out and put it in the new phone.
Here's a video on transferring sims: https://www.youtube.com/watch?v=MiVlNvR_Y0o