Reliance Communications, probably the largest Dark Fiber Carrier [Unused bandwidth] has slashed tariffs on 2G GPRS EDGE Wireless broadband / Data Packs. Here are the most popular packs in every circle across India, Price and Free Data Download - 30 Days Validity for all the below plans.

Andhra Pradesh, Bihar, Jarkhand, Gujarat, North East, Punjab, Haryana, Rajasthan, Uttar Pradesh (east) and (West), West Bengal Rs. 99 6 GB
Himachal Pradesh, Karnataka, Rs. 99 4 GB
Delhi & NCR, Kolkata, Maharashtra, Goa, Madhya Pradesh, Orissa, Tamilnadu and Chennai Rs. 99 3 GB

Other Popular Plans
PAN India - Rs 178 20GB with 30 days validity
PAN India - Rs 248 20GB with 90 days Validity