As many as 40,000 units of the much-hyped handset launched exclusively on Flipkart, was sold out within 4.2 seconds, said company head Hugo Barra on Twitter.

The debt-laden company, which recently won its first railway construction project, is looking at a four-fold increase in its order book next year.

Reports by CAG earlier on the 2008 telecom licence scam had resulted in the cancellation of 122 licences.

Calls from Viber to other users of the app are already free.

The dual-technology operator plans to divert its mobile customers and those who use mobile internet to the GSM side of its business, and devote the CDMA business exclusively to dongles.

Most of the steep rate cuts announced might also not translate into bill savings for subscribers