The per second billing will be available to 2G and 3G subscribers. While the rates are as low as half a paisa per second for making local and STD calls in the same network, the users would have to pay one paise per second to make calls outside the network.
The rates for text messages or SMS have been fixed to be at 25 paise for local, Re 1 for national and Rs 2.50 for international.
Apart from this, MTNL also introduced lowest-in-the-industry Data usage rates. The rate of just 1 paisa per 10 KB will be applicable to both GPRS and 3G services.
The new billing plan, which consists of the lowest tariffs for voice call, SMS and data service, was made effective on Wednesday, Dec 2.
The price war between the service providers was sparked off by Tata DOCOMO, which was the first company to introduce per-second billing.