Microsoft has used Mobile World Congress 2015 to reveal a number of new smartphones powered by its Windows Phone 8.1 operating system, including two of its own phones.

In addition, Microsoft CEO Stephen Elop says the company is planning new flagship devices later this year.

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.

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.

Microsoft has unveiled more details about its next generation of Windows, which was first revealed last September.

Windows 10 will be installed on new devices, will be available to buy and will also be available as a free upgrade to customers who move from Windows 7, Windows 8.1 and Windows Phone 8.1 within the first year.

Microsoft has introduced two new Nokia-branded feature phones: the Nokia 215 and the Nokia 215 Dual-SIM.

Pricing is expected to be $29 before taxes and subsidies (£19 excl. VAT; £22.80 incl VAT).