It also announced to slash the call charges of landline services by 50 per cent.
Under the landline services, STD rates have been reduced from Rs 2.40 to 1.20 paise per minute to all networks in general and 'sulabh' plan.
"The intra-circle call charges, to BSNL network and inter circle call charges to all the networks, has also been reduced by 50
Roaming charges under prepaid and postpaid services have also been revised.
Earlier this year, private telecom operators like Airtel and Vodafone had reduced their STD and roaming charges.