I am currently using Intex Neo 4.
Gives me one weeks battery backup with about 30-50mins of daily calls. It has 1800mAh battery and can be charged with micro usb or nokia charger.
It has some pretty features: it vibrates when the call gets connected; keypads lit up few times after a missed call or the sms is unread; two microSD slots; sms scheduling; you can check battery level; call & sms blacklist; import/export of contacts & sms; password protection for sms/contacts/call history/etc; and its quite small.
Bought it locally for Rs.1100.
I have used two other basic phones but this one is best so far.
