1. Remove out your battery and see the IMEI code of the Mobile.
(usually it is 15 digit numbers)
2. Or, just type *#06# (star. ash. zero six, ash) in the same mobile to be checked.
Now, you will get the IMEI(International Mobile Equipment Identity) number.
3. Write down the IMEI number and enter it in the website: http://www.numberingplans.com/?page=analysis&sub=ispcnr
4. You will get all the details like manufacturing date, serial number, phone version number etc., about the mobile phone.
5. Have a nice Day!