[Resolved]  Samsung Galaxy S Duos — Hanging Problem

I had purchased Samsung galaxy duos smartphone GT-S7562 in 9 November 2012 and from the day one the handset is hanging too much
while using contact app, sms app,playing games ... so i go for a samsung care support at my city and
They had to flash my phone and install latest improvement updates also ...
but it's still laggin while using app. and hanging to much ...
i take out the bettery to restart my phone when Hanging ... giving below problems.

1) Operation is extremely slow
2) Phone hangs repeatedly
3) Sometimes the phone does not display the caller name when the phone rings
4) Data upload and transfer is very slow.
5) Touch screen operation is not effective
6) While exiting any application the operation is very slow
7) Sometimes when i go to message box, i can see the contact no.s only. After few seconds the names of contacts start popping up
8) Facebook application also operates very slow on the mobile. It keeps showing loading before displaying details on the screen
9) After taking a photo or video when i want to review it, it takes longer time to load.
10) I have deleted lot of applications from my cellphone due slow operation as well as transferred all the photos, videos to external sd card but there seems to be no improvement
11) while viewing a photo or video there are lot of instances when i tilt the camera by 90 degree, the video or photo does not timely rotate on the screen
12) while using fb application when the details are displayed and i want to scroll the screen, the response is lethargic.


i cant understand that, why samsung brand is not able to solve this problem and why launched a unsuccessful device for people ...
i pay 15800 for this Smart phone but then why samsung Qualities phor mobile is too poor ...?
Rohit Rai