Facebook has announced its latest quarterly earnings figures and has also revealed details of the social network’s mobile-based users.

The number of monthly active users (MAUs) was up 15% year-on-year to 1.28 billion, with mobile MAUs up 34% to 1.01 billion.

We begin this week's podcast with a discussion about the Heartbleed bug, the effect it's having on the mobile industry and the wider issues for all internet users.

We're also talking about the future of BlackBerry, UK 4G coverage, new CEOs, Bluetooth connectivity, privacy concerns and the next generation of mobile processors.

Facebook and WhatsApp have received a letter from the US Federal Trade Commission reminding them about user privacy.

In February, Facebook announced that it was planning to acquire messaging service WhatsApp in a deal worth $16 billion (£9.6 billion).

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.

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.

Mark Windle, head of marketing at OpenCloud, predicts that this year’s reduction in the number of traditional telecoms operators in some countries will provide an opportunity for other operators to innovate and capture market share in 2016.

He says next year will be a year of rapid change for telecoms… whether it’s MVNO disruption, competitive tariff pricing or simply defence from the ‘dark art’ of hacking.

Mark Bridge writes:

The most memorable moments in life often go unrecorded. You don't have your camera in your hands. Your finger is still hovering over the 'pause' button on your audio recorder. Or you were simply too busy experiencing whatever was happening. It's all about the one that got away.

That's where Kapture can help.

Mark Bridge writes:

James Rosewell shows me a colourful roll of paper that's the width of an iPhone but well over three metres long. When I look closer, I can see it's a printed copy of the Wall Street Journal's mobile website. That's a lot of scrolling to do... and a pretty unfriendly user experience for anyone reading the news online. Why does it work so badly?

This week we're talking about BlackBerry's options for the future, Vodafone's 4G launch, Apple's patent victory and LG's new smartphone.

We also discuss ZTE selling its Firefox phones on eBay, Nokia's acquisition of NSN, the cost of phone calls in Europe, the controversy about recycling bins that monitor footfall and the new face promoting HTC.

The Motorola Moto X smartphone opens this week's show, despite not having a European release... but there's plenty of other UK news.

We talk about O2's plans to launch 4G mobile services later this month, we look at the ASA's ruling against EE, we contemplate the government's plans to eliminate some mobile 'black spots', we wonder when Android's market share will start to shrink - and we discuss many other mobile telecom stories as well.

James Rosewell interviews Ruth Barnett, head of communications at British-based technology company SwiftKey.

As well as talking about the SwiftKey keyboard app they also discuss competition in the mobile application space, working with manufacturers and the opportunities presented by 'Bring Your Own Device' schemes.

In this week's show we look at Google's new product announcements, O2's closure of its mobile telecare service and the clearance of radio frequencies for 4G services.

We also talk about the latest collection of quarterly results from Apple, Samsung, Amazon, LG and Facebook. Who's doing well - and should anyone be worried?

We start this week's show by discussing the recent quarterly results from Google, Nokia, Vodafone and Microsoft.

There's also time to talk about SIM security, Ubuntu's crowd-funded smartphone, the HTC One mini, smart watches and an unusual process for recharging your phone battery.