Displaying the Electronic Serial Number (ESN) and International Mobile Equipment Identity (IMEI) number on a Motorola RAZR phone is necessary if you bought the phone and need to apply for a mail-in rebate, or if you are transferring service to the phone from another device on your account. The process for checking the serial and IMEI numbers on RAZR phones varies depending on whether you have a RAZR that uses the Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA) standards. Serial numbers, also known as ESNs, are used for CDMA phones, while IMEI numbers are used for RAZR phones on GSM networks.
GSM Motorola RAZR Phones (AT&T, Cingular and T-Mobile)
Dial "*#06#" on the keypad of your Motorola RAZR to display the IMEI number on screen.
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Write down the IMEI number. It is 15-digits long and includes only numbers.
Remove the battery cover and battery to locate the 15-digit IMEI number on a white sticker affixed to the back of the RAZR. This is an alternative method that is only necessary if the battery is dead or you were unable to type "*#06#" because of damage to the keyboard.
CDMA Motorola RAZR Phones (Sprint, US Cellular and Verizon)
Open the "Menu" on your RAZR for a CDMA carrier like Sprint, US Cellular or Verizon.
Open the "Settings" menu and then select the "Phone Status" option.
Select "Other Info" and, when prompted, select "ESN" to view the serial numbers for your Motorola RAZR. Serial numbers for CDMA phones vary in length depending on the model and carrier. The Hex ESN is eight, 14 or 15 alphanumeric characters in length, while the Dec ESN is 11 or 18 characters.
Remove the back cover over the RAZR and remove the battery to locate the ESN numbers if you are unable to turn on the phone or the keypad is damaged. The ESNs are printed on a label affixed to the back of the phone.