Want QWERTY supported android smartphone ranging Rs12000-Rs20000

Hello,
I'm at a bit confused state about buying a smartphone supporting QWERTY keypad in Android as the QWERTY market is shrinking.

Following are my specification for it:
1) QWERTY keypad enabled.
2) It should be Dual-Sim, supported.
3) Runs on android( 4.2 or above) platform, please suggest if Blackberry OS can be a worthy replacement( note that I'm a college student not a businessman).
4) Processor above 1.2GHz plus RAM more than 2GB
5) Internal Memory 8GB or above
6) Battery should be more than 2000mAh
7) Screen size near 4 inch.
8) Scratch resistant screen, would be perfect if IPS display

I'm not a gamer, so need not that level of specification, only a normal specification with bit improvement in multimedia section as per the price range.