A simple Googling and I came up with this
Your phone's IMEI (International Mobile Equipment Identity) number is an uniqueinternational "serial number" for your phone to be properly identified from any other phones. It is normally a 15-digit number. However, sometimes you might find it to be 17 digits. But the real effective IMEI number is only the first 15 digits, the last 2 digits are unimportant as they are just checksum numbers.
Your IMEI can be found by the following 2 ways:
1. You can press *#06# on your phone's main screen (where you enter phone numbers) to see it displayed on screen.
2. Remove the back cover (if any) and the battery, there is a 15 digit serial number printed on the back of the phone.
We recommend you to always use method 1 to retrieve your IMEI number since it is truely the IMEI number of the mobile phone. When you are sending us the IMEI for unlocking purpose, please only send the 15 digtis without dashes (-) or space ( ).
Umeona hapo kwenye RED