Find My iPhone is the switch behind iCloud Activation Lock. When it is ON, the device asks for the previous owner's Apple ID after every reset — so a used iPhone with FMI ON cannot be set up by anyone else. Type the IMEI or serial number and see the status in seconds.
A real check, straight from our own servers.
Find My iPhone is switched on, so iCloud Activation Lock is active. After a reset the device will ask for the previous owner's Apple ID and password. Ask the seller to turn it off before you pay.
Yes. Apple records the status against both, so either one works. The IMEI is under Settings › General › About, or dial *#06#.
This one is. Everyone gets a few free checks a day; resellers with an account can run as many as they like through the API.
No. FMI only says whether Activation Lock is on. Run the free IMEI blacklist check as well to see whether a carrier has reported the device lost or stolen.
Resellers plug our catalogue into their panel or website — DHRU Fusion out of the box, plain JSON for your own code — and sell every check under their own name, at wholesale prices.