An investigation by Channel 4 News has shown that second-hand smartphones sold in the UK by Cash Converters and CEX may contain recoverable data despite having had a ‘factory reset’.

Information security specialists SensePost used software tools that were “freely available” to find personal information about the phones’ previous users. This included browsing history, contacts, text messages, photographs and personal documents.

The UK Office of Fair Trading (OFT) has published a set of principles that clarify its position on the legal obligations of the online and app-based games industry.

It follows last year’s investigation into gaming industry practices that were potentially misleading or broke consumer protection laws in other ways.

Iain Graham, James Rosewell and Mark Bridge return with their first mobile industry podcast of 2014.

This week they're looking at new Samsung, Sony and ZTE products from CES, they're talking about Android embedded in cars, they're catching up with the latest news from BlackBerry, they're discussing cheque payments by smartphone, they're revealing complaint data from Ofcom and they're investigating quite a few other stories as well.

The Information Commissioner’s Office, the independent UK authority responsible for promoting openness by public bodies and data privacy for individuals, has warned consumers to protect their personal information when installing new mobile apps.

A UK-specific survey carried out by the ICO earlier this month found that 59% of adults in the UK had downloaded a mobile app, although 62% of these people were concerned about the way apps could use their personal information.

We start this week's show with news about the European Commission's plans to end mobile roaming charges completely from next year.

We're also talking about the future facing Twitter and Dell, Vodafone's security challenges in Germany, app development, wireless charging, mobile payments and Nokia's Android-based smartphones.