Want to buy Sony Ericsson mobile phone? Scare that you get an old phone? Here is a simple guide to check the manufacture date or your mobile phone birthday. 
Open the case, get out the battery. You will see a lot of serial number. Find something like 07W11 in there. 07 indicate the year while W11 mean 11th week. This tell that your mobile phone was manufactured at around end of March 2007.
