How Can You Check If an ESN Number Is Clear on an AT&T Phone?

To check if the ESN or IMEI is clear on an AT&T phone, you first need to retrieve the number physically or by using the phone's software. Next, enter the IMEI on a third-party resale website to determine whether the phone is valid to use.

  1. Determine the IMEI

    The IMEI is located under the battery on all AT&T phones. If it has been removed or obscured, dial *#06# from the handset. The IMEI is then displayed on the screen.

  2. Locate a third-party resale site

    Go to or a similar site. Navigate to the ESN check area of the website.

  3. Enter the IMEI number

    Once you have entered the IMEI number, the results are displayed within minutes. If these steps fail, contact AT&T customer service.