Sure, this sounds good, but is it really? CDMA carriers have had the ability to track and block phones via ESN numbers for a long time as a consequence of how they are provisioned on the network. A GSM network relies on SIM cards to identify phones. In addition to blocking stolen devices, CDMA carriers have also used their control to hold phones hostage when there is a billing dispute.

While this system is being mandated to make stolen phones useless, it won't stop there. If the carriers can work out a way to block devices that use SIMs, they're going to use it against customers.

Also, it's not going to stop people from stealing phones. CDMA phones have had this functionality forever, and thieves still take Verizon phones all the time. People that steal things are not smart.
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