We're back from Mobile World Congress 2013 with the latest news for the UK mobile phone industry.

Today's conversation covers new handsets, forthcoming operating systems, apps, mobile payments, VoIP, 4G and Facebook's two-tier internet.

In August last year LG Electronics announced it had sold more than five million 4G LTE smartphones worldwide - and just over six months later it’s doubled that figure.

The company says it’s now sold more than 10 million LTE smartphones, having started selling its devices in 2011.

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.

LG Electronics has acquired the webOS operating system - originally created by Palm four years ago - from HP. This includes the webOS source code, documentation, engineering talent and related websites.

In addition, HP will also license LG to use patent that cover system and user interface technologies with its webOS products.

Alcatel has already declared that its new One Touch Fire is the world’s first smartphone running Moxilla’s Firefox OS - but Mozilla says it’s also working with LG and ZTE to build the first Firefox OS devices… and notes that Huawei will follow later in the year.

These first-generation Firefox smartphones are expected to launch in Brazil, Colombia, Hungary, Mexico, Montenegro, Poland, Serbia, Spain and Venezuela.