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.

Producing mobile phones for older customers requires much more than big buttons and a simple interface. At Mobile World Congress last month we spoke to two major players in this growing sector: Swedish company Doro and Austria's Emporia Telecom.

Our first conversation was with Harald Obereder, Chief Technology Officer at Emporia, who spoke to Mark Bridge about handset design and user interface design. This was followed by an interview with Chris Millington, Managing Director for Doro UK and Ireland, about research and development in the 'senior tech' market.

This year's Mobile World Congress was notable for the number of product launches by handset manufacturers. To get a better understanding of smartphone manufacturing, we spoke to Johan Lodenius of semiconductor company MediaTek.

He gave us a simple overview of how 'fabless' manufacturing works, discussed developments in smartphones and wearable devices, contemplated the end of the PC era and talked about the importance of driving costs down.

This week's programme begins with some of the biggest news stories that came out of Mobile World Congress.

Iain, James and Mark then move on to the other headlines from the past few days, including Boeing's secret agent smartphone, Apple's plans for mobile in-car entertainment, a new structure for Telefonica and new technology for mobile payments.

Dr Kevin Curran, Reader in Computer Science at the University of Ulster, joined us during Mobile World Congress to offer his well-informed opinion about trends in mobile technology.

We talked about a wide range of topics, including battery life, disposable tablets, wearables, m-health, 4G fragmentation, connected furniture, M2M security, the rise of video and the IEEE.