Telecom service provider Bharti Airtel will soon charge its customers extra if they make calls on Skype, Line, Viber and other apps using their mobile data packs, the company said on its website.
 
 "All internet/data packs or plans [through which customer can avail discounted rates] shall only be valid for Internet browsing and will exclude VoIP [both incoming/ outgoing]. VoIP (Voice over Internet Protocol) over data connectivity would be charged at standard data rates of 4p/10 KB [3G service] and 10p/10 KB [2G service]," Airtel said.
 
 The company in a statement said: "We have made some revisions in the composition of our data packs, and will offer VoIP (Voice over internet protocol) connectivity through an independent pack that will be launched shortly. Our customers can continue enjoying voice calls over data connectivity by opting for this VoIP pack, or simply use VoIP services on pay-as-you-go basis.