I don't have a link, but as of 11/1/2012, the FCC mandated stolen handset/IMEI database is officially live for each major carrier - AT&T and T-Mo (Verizon/Sprint were already tracking since ESN's were tied to activations).
If you regularly buy your handsets secondhand, you may want to double check with the original carrier before your plunk your cash down whether the IMEI is flagged as stolen now.
Note: The GLOBAL (shared) database isn't yet fully active, but providers will be adding entries to it over time meaning your unlocked T-Mo phone may magically stop working on AT&T at some point because it's been flagged as stolen.
Just a PSA!
If you regularly buy your handsets secondhand, you may want to double check with the original carrier before your plunk your cash down whether the IMEI is flagged as stolen now.
Note: The GLOBAL (shared) database isn't yet fully active, but providers will be adding entries to it over time meaning your unlocked T-Mo phone may magically stop working on AT&T at some point because it's been flagged as stolen.
Just a PSA!