A few days ago, Uber around India, started to offer INR 600 credit for new signup, instead of INR 300 which is the usual credit you get on another day. Initially the promotion was valid for people signing up till February 1, 2015. This has now been extended to an indefinite period.
Uber is present in 11 cities in India now:
If you want, can use my referral link, and I would be thankful for your support.