Stolen Phone Checker:

CTIA’s Stolen Phone Checker – powered by the GSMA Device Check service – is a public service designed to limit the resale of lost and stolen mobile devices in the United States and to help consumers, businesses, and law enforcement agencies make informed decisions about the status of a mobile device.

Looking to buy a used phone? Go to this page and enter the IMEI/MEID/ESN and submit. Good idea.

[Via 9to5Mac]