but many legacy Sprint subscribers have still yet to swap out their SIM cards. To convince those customers to make the switch, T-Mobile is offering them a $10 bill credit, as The T-Mo Report ...
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How Do SIM Cards Work?No authentication, no wireless access. You might remember back in the day (especially in the United States) when CDMA was more prevalent and Verizon and Sprint phones didn't use SIM cards and ...
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