Verizon Makes SIM Swapping Hard. Why Doesn't AT&T, Sprint, and T-Mobile? [telecom]

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Verizon employs different security procedures when porting a phone number to a different SIM card than the other carriers. This is making SIM swapping attacks harder to perform against Verizon customers.

By Lorenzo Franceschi-Bicchierai

Last week, we revealed the existence of a little known feature that could make T-Mobile customers a bit more secure against the rising fraud known as SIM swapping.