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.

Here’s an edited transcript of our new monthly podcast, broadcast on 30th January 2015.

[Iain Graham]: Hello, it's Friday 30th January 2015. Welcome to this month's edition of The Fonecast. That’s right, you heard correctly: we’ve temporarily moved to a monthly format. If you’d like to join 51Degrees in sponsoring the podcast and returning us to weekly programmes, please get in touch via our website. Now, on with the show.

Mark Bridge writes:

What’s the secret of Apple’s success? That’s the question I was asked earlier this week by LBC radio during a report on Apple’s impressive iPhone sales and its record quarterly results.

So here are six reasons I think Apple is doing so well at the moment.

Mark Bridge writes:

If you listen to this week’s edition of The Fonecast - in which we predict what’ll be happening in the mobile telecoms industry during 2015 - you’ll hear James Rosewell say that BlackBerry’s handset business is doomed. Well, actually that’s not quite true.

Jon Carter of Deutsche Telekom has provided us with his ‘Connected Home’ predictions for 2015:

Connected home products and services rely on different communication standards, be it ZigBee, HomeMatic or Z-Wave. Only platforms which both handle established standards and are able to learn new protocols will hold their ground in the market in 2015. Customers don’t want to be limited in their product choices or care about compatibility issues. Integrating any device into a connected home setup needs to be smooth and simple.

Mark Windle of OpenCloud writes:

In 2014, operators focussed on rolling out LTE, but some have lost sight of the bigger picture. 2015 will see traditional telecoms services delivered over multiple access technologies, of which LTE is just a part. As next year fast approaches, our predictions take a step back and look at how the industry will adapt to the changing landscape.

Iain Graham, James Rosewell and Mark Bridge return to review their mobile industry predictions from last year. Which mergers, partnerships and developments did they forecast correctly... and which didn’t work out as planned?

Later in the programme, the team anticipates some of the topics that will be hitting the headlines during 2016.

Mark Bridge learns about the mobile technology trends at Mobile World Congress 2015 by chatting to James Rosewell of 51Degrees, Dr Kevin Curran from the IEEE and Chris Millington of Doro.

They talk about wearable devices, wireless charging, mobile operating systems and much more... including some of their favourite products from the exhibition.

We're taking a look back at the biggest mobile industry news stories from February 2015, including allegations that the UK's security service tried to breach SIM card security by hacking into one of the world's biggest SIM producers.

We also talk about the planned BT and EE merger, the creation of two new UK virtual networks, some acquisitions in the mobile payment arena and a new Ubuntu smartphone.

In today's programme Mark Bridge talks to Chris Millington, who's Managing Director for Doro UK and Ireland.

They discuss the state of mobile retailing in the UK, the future of wearable devices and - as you might expect - smartphones for seniors.

We're back with a month of mobile industry news, including takeover talks and takeover rumours. O2 and Three are said to be discussing a merger... but is there any truth in the suggestions that BlackBerry could be up for grabs?

We also discuss Apple's record-breaking quarterly figures, the highlights of CES and the launch of Microsoft Windows 10, as well as saying farewell to the current version of Google Glass.