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.

Mobile technology distributor Brightstar says it’s completed its acquisition of European rival 20:20 Mobile. 20:20 was originally part of the Caudwell Group, along with Phones 4U.

Brightstar announced its plans last December after months of industry speculation.

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.

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.

This week's podcast starts with Lenovo's purchase of the Motorola Mobility smartphone business. Was it a good deal for everyone?

We also talk about network infrastructure sharing in the UK, mobile malware, 3G coverage, misleading apps, mobile advertising, Samsung's retail plans and global tablet sales.