A:AnswerNo--it's not duel sim. In regards to trade in value for your S105G, you will have to use the tool on either the best buy website or the samsung weebsite. Hope this helps.
A:AnswerHello, Bdan. Although this Galaxy S21 Ultra 5G is unlocked, we would suggest contacting the carrier to ensure their services can be added. Thank you for asking this question. ^Kayla
A:AnswerHello, Joni. 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