Make "deactivated" the norm. Oh, wait...
Thieves usually switch off cell phones immediately, thus rendering any signal-to-disable technology utterly useless.
It is alluring to think that phones may be thief-proofed by designing them so that they are deactivated by default. Only those that are authenticated and authorised would receive a regular network signal to enable them.
Perfect isn't it?
The only drawback of this system is that we have it already, and it clearly does not work!
GSM telephony authenticates the hardware via the serial number of the phone (IMEI), which has been made "hard" to change. The subscriber is authenticated via the chip-and-pin of the SIM card (IMSI).
There is little economic incentive for criminals to crack GSM SIM cards. (For CDMA phones where there is no removable subscriber card the situation is different and phone id. cloning is a popular criminal activity.)
The weakness of IMEI protection is that the phone makers have tended to secure other settings using the same technology. (Things like network locking and the nobbling of features.) In a number of countries it is legal for a third party to change these for the legitimate owner of a handset. Since the same technology secures the IMEI, once the protection can be circumvented for legal reasons, the IMEI is accessible too. Worse yet, not all countries have made it illegal to change serial numbers.
In practice the IMEI can readily be changed in seconds by criminals with little technical knowledge, using a PC with the right connector for the phone and suitable software that can be obtained via the Internet. The reprogrammed phone is back on the street with its new serial number in minutes, often before the original serial number has been blacklisted.
How would the proposals change any of this?