Okies, but I was just afraid of void warranty, which I'm no more. As I now know that I'm missing out the main amazement by not rooting and using custom rom.
And XDA have articles on backup of original firmware so that everything can be restored back.
I'm littile bit comfortable now with all these things than when I first bought my phone.
Actually I bought this in EMI, so see, I don't wanna loose it before I even pay 1st EMI
That's the main reason. Otherwise I'm too interested in RnD's