Now a days IMEI number is very useful to identify the device by the Network provider,whenever your mobile stolen at that time by using IMEI number we can access the exact network and we can put in Blacklist
Dial *#06# in your mobile it will display your IMEI number
(or)
For Android Mobiles
Follow the below navigation in your mobile
Go to Settings>About Phone>Status>IMEI
by doing this you can get your IMEI number of your mobile
Dial *#06# in your mobile it will display your IMEI number
(or)
For Android Mobiles
Follow the below navigation in your mobile
Go to Settings>About Phone>Status>IMEI
by doing this you can get your IMEI number of your mobile