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Hello there, thanks for asking us your question about the Samsung Galaxy S25 Ultra. An unlocked mobile phone is not restricted to any specific cellular carrier's wireless network. Unlike locked devices that only work with the network that sold them, unlocked devices give you the freedom to switch between compatible carriers simply by inserting a new SIM card or activating an eSIM. Hope that helps! If you have any other questions for us, please let us know by reaching out to Support. Thank you for being a loyal Samsung customer. - Debra
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