Phone under 20 grand

Z

1. Budget?
Not over 20000.

2. Display type and size?
Not less than 3.7 inches

3. Form Factor?
Bar

4. Preferred choice of brand?
Blackberry, Motorola, HTC

5. Preferred input method (QWERTY, touchscreen, numpad, touch-n-type).
QWERTY or Touchscreen

6. What camera option you want? Please specify need for flash, autofocus, front facing camera.

5MP. Flash and autofocus.

7. Preferred operating system? (Android, Symbian, iOS, Windows Phone etc).
Android and blackberry OS 7

8. Preferred connectivity options (3G, Wifi etc)Please specify clearly.
3G, wifi, bluetooth

9. Preferred applications (Flash, Swype, GPS, etc)?
All three mentioned above - Flash, GPS and Swype

10. Primary use of handset (multimedia, camera, mails, internet, gaming etc)?
Texting, media, Internet, Mail, judicious app usage
11. Any specific mobile phones in consideration?
None

It should have a good battery life, ideally should last for more than a day.

jst extend ur budget a lil bit n get HTC Desire S

Nexus S. It is going to get the ICS update soon.

^^^^ But it is discontinued by Samsung

It is not discontinued, it is out of stock (online stores). It still gets support from Samsung. OP can easily get one at his retail store @ 20k.

^^^
I have inquired about it,it is discontinued(atleast in India).
And whoever is selling it,the models are old and not the new ones.They must have got some old stock.