New Delhi, Dec. 1 -- India's Department of Telecommunications has directed messaging apps like WhatsApp to ensure that users aren't allowed to access these services without active SIM cards in their phones.

As of now, 'SIM binding' usually happens only when such an app is first used. Those who go abroad can use their apps via any internet link they find, with or without a SIM.

For web-based use, app users will now be asked to log in afresh every six hours through a QR code. The idea is to ensure that our online chats are always traceable to a registered SIM, but it will make communication via laptops everywhere and through phones abroad cumbersome.

It may push users headed overseas to buy pricey multi-nation travel packs for smooth tra...