You need to hurry, if you want to own the only 4G enabled Lumia, Lumia 638 in India on a discount.
Microsoft store on Amazon is selling Lumia 638 for just Rs 7499. This amounts to a Rs 800 discount on original sales price of Rs 8299. This offer seem to be valid for today only and only 8 hours are left before the deal expires.
Lumia 638 and Lumia 630 are not much different and Lumia 638 has its advantage in terms of 1 GB RAM and LTE support.