According to a Wall Street Journal report, four of the largest wireless carriers in the US are working with the US government to create a national stolen phone database. Verizon Wireless, AT&T, Sprint and T-Mobile will develop their own databases and then merge them into a centralized server within the next 18 months. Eventually, regional carriers will also participate in this initiative.
The database will help carriers and law enforcement track lost and stolen phones. Besides tracking phones, carriers have agreed to block both calling and data services for these blacklisted phones. This will be an easy task for Verizon and Sprint, but not so simple for T-Mobile and AT&T.
Verizon Wireless and Sprint already track each subscriber's phone using the phone's unique electronic serial number. This lets them easily block any phone that's been reported lost or stolen. AT&T and T-Mobile do not have a similar service in place, because their GSM phones use SIM cards. As long as you have a valid SIM card, you can use any phone, regardless of whether it is lost or stolen. These two GSM carriers are working on new technology that would let them track and block a phone using a unique ID.