I am in chennai, currently having 64kbps unlimited & the I asked them yesterday, if they have any night unlimited plans & asked them to mail me the details. This is following info I got from them about night unlimited plansBW Branding Subscription charges Download limit Validity Note512Kbps Blast Quarterly(night unlimited:11pm-9am) 1684 3GB 3 Prepaid512Kbps Blast Xtra(night unlimited:11pm-9am) 3367 7GB 6 Prepaid512Kbps Blast Max(night unlimited:11pm-9am) 6734 15GB 12 PrepaidI guess we can pay 1684, and use up the 3 GB in 1 month if we want, since it is prepaidConsidering going for the change