Many websites, such as iPhoneIMEI offer services to check the status of an International Mobile Equipment Identity, including iPhoneIMEI. You can also your wireless provider or contact Apple support to check the status of the phone’s IMEI.
To find the phone’s IMEI, tap Settings, General and then About to see the IMEI number listed along with other general phone information. Enter the IMEI into the iPhoneIMEI website when prompted. Once the number is entered, the software tells you whether the IMEI is clean and ready to be activated or if there is an issue with it. If there is an issue, contact Apple, which can answer any questions you have about your IMEI through chat or support tickets.