Mark Bridge writes:

Mobile phones have been hitting the mainstream news over the past few days. There was Channel 4’s report about data on second-hand phones not being properly deleted before the handsets were re-sold, there was the latest round of the Smart UK Project and there was Tim Muffett’s story about the mobile-enabled high street on BBC Breakfast this morning.

Also big news was Microsoft’s decision to pick long-time employee Satya Nadella as its new CEO. There’s a new role for founder Bill Gates as well, which suggests he’ll be doing more hands-on stuff in the future.

Partnerships have been another recent theme. MasterCard has teamed up with UK mobile payment and advertising business Weve to develop a contactless mobile payments system. I can’t imagine Visa is especially happy, given the relationships it has - or had - with O2, Orange and Vodafone.

And in other network news, EE and Three are reported to have signed a sharing deal for 4G services in the UK. Meanwhile Nokia and HTC have agreed a patent licensing deal with each other, as have Cisco and Samsung.

But there’s been breaking up, too. Sony Corporation has agreed to sell its PC business to Japan Industrial Partners and will stop making Vaio-branded computers, while Alcatel-Lucent says it’s talking to technology investment business China Huaxin about the sale of its Alcatel-Lucent Enterprise division. The times, they are a-changin’.

Finally, figures from Cisco anticipate an almost 11-fold increase in global mobile data from 2013 to 2018. A total of 190 billion gigabytes of data is expected to be consumed on mobile devices in 2018, which is the equivalent of every person on earth streaming a YouTube video clip every day. Mond you, more than half of this will be carried on WiFi rather than via cellular networks.

Which, as James talked about in our 2014 predictions podcast last year, prompts the question: exactly what is ‘mobile’ anyway?