Iain Graham, James Rosewell and Mark Bridge are reunited for their regular weekly look at the latest UK mobile industry headlines.

Today they're talking about smart watches, an Apple iPhone announcement, the new HTC One M8, the closure of Ovivo Mobile, text spam, peer-to-peer messaging, government hacking and mergers.

A new iOS app that allows instant messaging without an internet connection is rapidly moving towards the top of the ‘free app’ charts.

FireChat, developed by San Francisco-based startup Open Garden, can be used on an iPhone, iPad or iPod touch without WiFi or cellular connectivity.

Messaging was very much on the agenda at Mobile World Congress this year, following Facebook's announcement that it was planning to acquire WhatsApp in a 19 billion dollar deal. So if the future for this type of internet-based 'over the top' messaging service looks good, what does this mean for SMS?

To find out more, we spoke to Stacy Adams of mBlox to learn what was happening in the messaging world, to find out how SMS is being integrated with mobile apps - and to discover some of the other ways SMS was being used by businesses today.

Messaging service WhatsApp, which is due to become part of Facebook, says it’s working to add voice calls to its mobile application.

The new service would be seen as a challenger to existing VoIP services such as Skype and Viber as well as a threat to network operator revenue.

Nokia has announced a new software platform - Nokia X - that’s based on the Android Open Source Project.

Initially the handset manufacturer plans to release three new devices running Nokia X. They’ll join the company’s Windows Phone (Lumia) and Series 40 (Asha) smartphones.