Total worldwide revenue collected by the mobile application market will pass $30 billion (around £19 billion) by the end of this year, according to ABI Research.

That’s the cumulative total from chargeable app downloads, in-app purchases, subscriptions and in-app advertisements - and it’s almost doubled since the end of last year.

Ofcom has launched a consultation about new laws that would allow ‘white space’ technology to be used the UK.

These so-called ‘white spaces’ are the unused parts of frequency bands that have been reserved for other uses, such as TV broadcasting, but could also be used for other applications such as broadband and M2M connections.

Virgin Media, which offers WiFi on 72 London Underground stations and plans to add a further 48 stations in the next few weeks, has agreed a wholesale deal with EE and Vodafone.

It means that Vodafone, Orange, T-Mobile and EE mobile customers will be offered free WiFi connectivity when this year’s free access ends.

Finnish company Jolla, which launched in July with plans to release a smartphone with a user interface based on the MeeGo platform, has demonstrated its user interface and the ‘Sailfish’ OS at the Slush start-up conference in Helsinki.

In addition it’s announced a forthcoming software development kit for Sailfish.

Orange Vallée, the part of France Telecom-Orange responsible for innovation and development, has released a free cross-network mobile app that enables users to make free voice calls, send messages and receive voicemail messages.

It’s called Libon and is available as an iOS app in 90 countries including the UK; an Android version is planned for early next year.