A new report from mobile analysts at Juniper Research estimates that 320.3 million smartphones were shipped worldwide in the first quarter of this year.

That's a year-on-year drop of almost 6%.

Sony Mobile Communications has updated its Xperia brand with three new X-series smartphones: the lower-spec Xperia XA, the Xperia X and the premium Xperia X Performance.

All have an improved camera with ‘Predictive Hybrid Autofocus’, which is capable of tracking moving objects.

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.

The ‘explorer edition’ of Google Glass was discontinued earlier this year - but now Sony has stepped into the market, releasing a ‘developer edition’ of the Sony SmartEyeglass.

It’ll cost £620 and is already available to order in the UK, with availability expected from March.

Sony has announced a collection of new devices at the IFA consumer electronics show.

The Sony Xperia Z3 has a 5.2-inch display and a 20.7 megapixel camera. There’s also a smaller version, the Z3 Compact.

Mark Bridge writes:

We’re back from Mobile World Congress – and what a show it was. Located at a new site that saw more visitors than ever before, the show had everything… except any particularly obvious theme from hardware manufacturers. Last year was the year of the quad-core smartphone, this year there was plenty of incremental innovation but nothing truly startling.

Faiza Elmasry of voanews.com writes:

Teenagers are often warned against texting on their cell phones while they are behind the wheel of a car, since distracted driving can lead to serious automobile accidents.

Many teens, however, are not aware that distracted walking can be just as dangerous.

Mark Bridge writes:

I like a challenge. I like learning. Ask me to do a spot of research and I’ll happily pore over books, trawl the internet and have lengthy conversations into the night.

So I was more than happy to help when Optomen Television, the company behind “Britain’s Secret Shoppers” on Channel 4, asked me for a few tips that would help viewers get a good deal on a mobile phone.

James Rosewell writes:

8 months ago I moved my main smartphone from Android to Windows Phone. I had entered a simpler world. There were less applications, no tethering option, voice dictation sucked and I couldn’t get a multi-SIM device. But overall I survived.

Then I started travelling more. I moved back to Android a few weeks ago... and what a disappointment.

Mark Bridge writes:

As the final days before this year’s Mobile World Congress approach, we discover there are two types of scheduled news announcements from the wireless telecoms industry.

There are the announcements delayed until MWC begins because the company wants to be part of the buzz at Barcelona. And there are the announcements made in the fortnight beforehand because they don’t want their story to get lost.

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.