International mobile number with country code, without '+' or '00', e.g. 31612345678 (31 = country code, 0612345678 = phone number, without leading '0').
iPhone: Settings -> General -> Info -> Wi-Fi Address
Android / Others: Settings -> About Phone -> Status -> IMEI (IMEI can also be retrieved by dialing *#06#)
You can drag the marker to anywhere in the right map!
Same format as your number
Drag te maker to anywhere to set your location.