App research specialist VisionMobile has published the latest version of its Developer Economics report, providing insights into mobile application development worldwide.

It estimates that 2.3 million people were mobile app developers in 2013, with 760,000 (32.9%) of them living in Asia and 680,000 (29.7%) in Europe.

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.

76.9 million tablets were shipped around the world in the last three months of of 2013, according to figures from the International Data Corporation (IDC). That’s 62.4% up from the previous quarter and a year-on-year increase of 28.2%, although a much lower growth rate than the same quarter in 2012.

Total tablet shipments for 2013 reached 217.1 million units; up 50.6% from the previous year.

The smartphone/tablet hybrid - usually described as a ‘phablet’ - isn’t as much of a niche product as previously thought. That’s the conclusion of a new report from Juniper Research.

It expects global phablet shipments to exceed 120 million units in 2018, up from an estimated 20 million last year.

In this week's podcast, James Rosewell and Mark Bridge talk about the new Zapp mobile payment scheme, Google's healthcare plans and an ultra-secure smartphone.

Also on the agenda are HP's new phablets, Jimmy Wales joining a UK MVNO, Apple's in-app purchases and plenty of research about tablets.