The STV of Rs 35 provides 20 paise per minute calls to any network for all local and STD voice call with a validity of 2 days whereas STV of Rs 48 provides 80 minutes of calls to any network (local and STD) with a validity of 3 days.

The denomination of these STVs may marginally differ from circle to circle, BSNL said in a statement.

In addition, BSNL has also launched other combo offers for prepaid GSM mobile customers providing talk value and data both at cheaper rates. The offers are applicable with effect from November 7 for limited period on pan India basis.

"No other operator in the industry has such an attractive STVs. These are available across the country to greet our valuable and loyal customers," Director (Consumer Mobility) BSNL Board RK Mittal said.

Recently, the state-run firm has also launched night calling STVs for its customers.