We're celebrating the seventh anniversary of The Fonecast this month with a handful of our favourite interviews from the early years.

You'll hear Ben Whitaker from Masabi, Truphone co-founder James Tagg, former Olympic athlete Steve Backley OBE and online banking pioneer Steve Townend.

Truphone is a pioneer of internet calling via WiFi - and it's recently announced a new service that aims to integrate GSM calls with its VoIP app.

In this special programme we interview Truphone co-founder and CTO James Tagg about the company's plans.

There are many mobile boundaries being blurred in this week's podcast.

Topics include Truphone's combined WiFi and mobile service, Skype's move to direct mobile billing, the rise of 4G and an Android-controlled satellite.

Mark Bridge writes:

Mobile networks aren’t what they used to be. As last week’s interview with Vince Russell of The Cloud demonstrated, more and more customers are relying on WiFi to augment their mobile data service.

Truphone is now planning to do exactly the same with voice calls and text messages by linking its mobile network with WiFi for even wider coverage.

UK telecoms service Truphone, which runs a mobile Voice-over-IP service and a mobile virtual network operation, has announced its intention to create a new service that combines the benefits of GSM with internet calling.

Truphone+ will enable customers without GSM coverage to make and receive calls on their ‘mobile number’ via a WiFi connection.

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.