A:AnswerUnlocked means that if you want to go carrier to carrier its possible. It also means that it does not come with all of the carrier-centric apps.
A:AnswerYes, the A21 works with a T-Mobile sim card. When I first installed the card, it didn't function correctly so I went to a T-Mobile store and a salesperson set it up for me. Works the same as my last phone that cost over $800.
A:AnswerHey there. If a phone comes unlocked, you have the option of which carrier's service is connected to the device. We would suggest contacting the carrier to ensure their services can be added. Thank you for asking this question. ^Kayla
A:AnswerWe got this phone to be activated with our Boost service and it was compatible. Just to be safe, though, check with your local Boost store before you buy. Who knows if this is a regional thing? They also charged us a lot to activate it.
A:AnswerMost of the phones used in promotions are expensive, so your net cost is hundreds cheaper if you buy a phone like this in a standard purchase with no strings attached.
A:AnswerHello, Alessandra Although this Galaxy A21 is unlocked, we would suggest contacting the carrier to ensure their services can be added. Thank you for asking this question. ^Kayla
A:AnswerHello, Shirley. We would love to get more information to assist you. Please reach out to us on Facebook at (http://m.me/samsungsupport) or Twitter at (https://twitter.com/messages/compose?recipient_id=18768513). We look forward to speaking with you. ^Kayla