i wanna know how to upgrade my k550i...plz tel me how do tht....send me the link where i can upgrade my phone...

go to the service center, they will do it free if your phone is under warranty.

Go to -->http://www.sonyericsson.com choose your country and enter the page and find support and then you get product support choose K550i and download the upgrade appliacation install and run it and follow the instruction use Dcu-60 or the one wich was with phone .....