Bharti Airtel today launched a new roaming scheme for its prepaid customers in Delhi which will enable them to receive free incoming calls in five states. "With this pack, Airtel prepaid mobile customers can now get up to 30 days of free incoming calls while travelling to Bihar, Jharkhand, Uttar Pradesh, Uttrakhand and West Bengal (except Kolkata) on a recharge of Rs. 21," Bharti Airtel said in a statement.

Airtel's Delhi customer at present are charged Re 1 for incoming calls, Re 1 for local outgoing calls and Rs. 1.5 paise for STD calls on roaming, the company said.