Yes the touch is capacitive and its very good. Comparable to any expensive touch screen set. (My many office collegues with expensive sets like HTX one X tried this set and they found touch to be very good.
It comes with one year warranty, There are terms and conditions for warranty hardware also included.
HVGA is HALF VGA. Quality is good but not as good as amoled screen.
WIFI is working fine.
Cam as i said is bad the pic quality is not good.
Overall i will recommend this phone in 8800Rs I mean you will not even good a symbian set in this price. Your Mamu must have tried an old 650 MHZ phone or a phone that was running low on internal or Ram. This phone comes with low internal memory and RAM so you need to be careful in installing a lot of apps on it. Normal day to day apps like browsing, Facebook, Youtube, skype, they all work fine.
Watch these 2 videos for more.
QMobile NOIR A2 Un-boxing - Review - YouTube
Qmobile Noir A2 (1 Ghz) - Unboxing & Short Review - YouTube