You want to buy a smartphone but the newest models seem to cost an arm and a leg. If you consider dumbphones to be a downgrade then buying a used smartphone may be your best bet.Many people sell unlocked phones online. The seller could be someone who wants to get some quick cash for a phone they no longer want. Or the seller could be a thief who runs a stolen phone ring.How can you tell the difference? Luckily, there’s an easy-to-use website that will check if the phone has been reported as lost or stolen. The IMEI Pro website can be used on any phone model from any manufacturer.How does it work? It runs your phone’s unique International Mobile Equipment Identity (IMEI) number through a database. Your cellphone’s IMEI is a 15-digit electronic serial number.First, dial *#06# and your phone’s IMEI number will pop up on your screen. Then enter that number into the site’s search bar and click “Check.” The site will tell you if that number has been “blacklisted,” meaning that it was reported lost or stolen.If you’re buying a used smartphone, a trustworthy seller will let you inspect the phone before you exchange money. Since this site works just as well on mobile formats, find the IMEI number and run it through the site before you hand over your cash.To try IMEI Pro for yourself, click here or click the blue button below.