Telefónica has announced three significant changes to its organisational structure.

It’s setting up a new business unit called Telefónica Digital. Matthew Key, who joined O2 in 2002 and had previously been in charge of Telefónica Europe, will run the unit. It’ll be based in London with offices in Madrid, Sao Paulo, Silicon Valley and a number of locations in Asia. Around 2,500 staff will be drawn from Telefonica and its associated businesses.

Mark Bridge writes:

You could probably describe Burnside Telecom as the world's largest mobile phone manufacturer. No, not production volumes - but the physical size of its products.

This UK-based designer and manufacturer produces a variety of mobile devices, from office-style 'desktop mobile phones' to the type of rugged outdoor telephone used at railway crossings.

Mark Bridge writes:

We have a new "mobile phone cancer" report to read - but, despite the headline, it offers no concrete reassurance or firm proof.

The main problem, as we've said on many occasions, is that proving 'absolute safety' is nigh-on impossible... particularly when the technology and the usage patterns keep changing.

Jawbone, a company that's probably best known for its noise-cancelling Bluetooth headsets, is planning high-tech jewellery that'll also keep an eye on your health.

UP by Jawbone is due to be launched later this year. It includes sophisticated sensor technology to track your movement, sleep patterns and nutrition.

We start this week's edition of The Fonecast by talking about Nortel's patents before moving on to Google+, roaming charges, mobile payments and health concerns. We also find time to discuss app stores, some new research and the Pope's iPad.

As usual, you can download this week's show from iTunes - or you can listen to the podcast by using the audio player on our website.