He said the impact of free national roaming on the revenues of service providers would depend on assumption of price elasticity, breakup of incoming and outgoing calls, termination and carriage charges.

State-owned BSNL has launched free incoming voice call facility. He said all 'wireless access service providers' have at least one tariff plan in which the incoming calls while roaming are free.
The minister said the TRAI had estimated total impact on annual revenue on wireless access service providers at Rs 1627 crore.

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