Oh...So Sorry Akhtar. Totally missed this thread. Did not receive any notification for a reply...again.
I'm in Indonesia.
If those "repair" centers can do firmware upgrades, then yes, you can go there. Firmware upgrades are Free.
Actually, there's no harm rooting your device. It just let's you have access to you device's system files.
Anyway, I'm also not sure the method for rooted device will work for your camera problem.
NP and this thread is not old. I just missed the notification of a reply. The case is still not solved.
What did you do before the problem occurred?
For bro Akhtar's case, was he'd apply the "PHONE TO CAM FW WRITE" in the system menu.
Just to confirm, can you check whether there's anything blocking the camera?
If you want to try, download This .zip file
and extract it.
There are 4 files inside:
Copy them into your device's /system/firmware/
folder, replacing those that are there.
Restart your device.
From your default dialpad, key in *#34971539#
and select "PHONE TO CAM FW WRITE
Restart your device and start your camera.Please note that I am not sure whether it will work, those 4 files was extracted from my GT-i9000.
And if it does work for you, please post a confirmation, hopefully this can provide some help to bro Akhtar too.