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Sprint/Boost/Virgin Devices: The existing SIM
can be used
Mobile service. If you need a replacement SIM, check for Gen Mobile SIM A, B, or C for compatibility.
Other Devices: For new devices or a device that
service, you can put in the new SIM and start activation. If
you are porting a number from a device that you are currently using,
insert the new SIM after your current service stops working and then