Airtel in undoubtedly India’s number one GSM Network with the largest subscriber base. They were offering Unlimited GPRS two years ago, but last year, as every moved to offering limited plans for GPRS, they also switched to offering limited MO and they popular plan was. RS95 Night GPRS Pack Day Free usage(8:01AM to 11:59pm): 100MB Night Free Usage(12:00 AM to 8:00AM) – 2GB Validity: 30 days Post Free Usage: 30paise / 50KB.

Looking at the current situation where every telecom operator seems to offer new plans every day, Airtel has resumes its truly unlimited GPRs pack, which you can avail for Rs15/Day. There is no limited of downloads or bandwidth usage.  get a speed upto 250KBPS which is Awesome.

If you want to go monthly, it would cost you around Rs450 which is quite affordable as you will be able to use to on laptop also, where you can

I would like to add one more thing from my personal experience, I was using this Rs95 Pack where I used to 2GB in Night and 100Mb in Day time, their system plays naughty sometimes, i have been charged for my usage several times, and the Customer Care People never understand the situation. I would suggest you to keep checking the balance of your phone in between.