I bought karbonn titanium s30 desire a week ago as my second phone . And let me tell you 1 thing its a peice of crap.
It clicks rubbish quality pictures even with 8MP primary camera with LED flash, auto focus and front facing camera us even worse ie 3.2MP front .
Capacitive touscreen is not responsive at all.
It also comes with very old android version kitkat 4.0 which is a bit downfall.
Battery backup is ok. not very impressive.
If you play games then this phone is not for you as it lags a bit much coz it only have 512 ram.
Final verdict
2/5