After catching up with last week's Microsoft announcement about new CEO Satya Nadella, we go on to talk about big changes for Brightstar and Sony as well.

There's also mobile payment news from MasterCard and Weve, some patent agreements, a warning about second-hand smartphone sales, a forecast of mobile data growth and a report about app developers.

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.

Sony Corporation says it’s agreed to sell its PC business to Japan Industrial Partners and will stop making Vaio-branded computers after its forthcoming spring 2014 product release.

The company says it’ll now be concentrating its mobile product line-up on smartphones and tablets.

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.

Sony has added two new models to its Xperia Android smartphone range.

The Xperia Z1s is a variant of the flagship Z1, with a 5-inch display and the same 20.7 megapixel camera sensor but new social camera applications.