The report you will receive from the app has been compiled from reputable sources of data and network carriers collaborating with the GSM Association initiative. In addition, the report is complemented with information from independent organizations and providers. HOW DOES IT WORK? 1. Download and install the app on your smartphone. 2. Type in your iPhone’s IMEI number (to obtain the IMEI type *#06# on the device’s dial screen) and press “Check phone”. 3. The report will appear automatically on the screen. Checking the IMEI of your iPhone with doctorSIM is as easy as 1-2-3!