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 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 discuss the UK government's forthcoming mobile spectrum auction, BlackBerry problems in the Gulf states, universal mobile chargers, the new Amazon Kindle ebook reader and the 'religion' of Apple. There's also an interview with Milly Allen, who's planning to broadcast her London talent shows via mobile phone.

In a special extended interview, Ross Catley speaks to Mark and James about smart metering in the UK. He explains the basics of 'smart meters', talks about the benefits for consumers and discusses the ways this technology will affect the mobile phone industry.

Iain, James and Mark take their regular look at the week's mobile industry headlines - from quarterly results to texting sharks - and also talk to Ross Catley about the problems and opportunities with smart metering.

Apple's "antennagate" press conference, Microsoft lets developers see Windows Phone 7, Motorola sells much of its network infrastructure business, Vodafone goes open source with sat-nav software, the Spanish go mad for SMS when they win the World Cup... and much more!

The week's mobile industry headlines - from mergers and partnerships to legal action and departures - plus a review of the BeeWi solar handsfree car kit.