Ques: I have my samsung duos b7722, i need to upgrade the firmware of my phone.....how to do it...please help me...
Ans: Thanks for showing interest in Techtantrik.com.
For upgrading the firmware of your Samsung GT-B7722, you'll have to download the "Samsung Kies" i.e. the PC suite for Samsung from the following link Download Samsung kies.
When you'll click on this link you'll be able to download the Samsung kies software. Just install it and go ahead with firmware update.