The company has upgraded its CDMA services to Pro 3 network which will offer about peak download speed of 14.7Mbps compared to 3.1Mbps offered earlier.
The services has been launched in Chennai, Bangalore, Hyderabad and Pune and will soon cover other big cities.
"Customers who need to use large amounts of data at high speeds can enjoy limitless internet usage at a never-before monthly plan of just Rs. 999, with the True Unlimited Plan, giving them worry-free usage of the Internet without any bill shocks," the statement said
At the promised peak speed, an user can download video file equivalent to general Bollywood movie in about six minutes.
Many telecom companies in their unlimited plans reduce download speed after customer exhausts certain data limit.
The plan has no limit on usage or download speed reduction during the validity period.