The International Data Corporation has reported that the worldwide mobile phone market grew 19.8% year-on-year in the first quarter of 2011, with smartphones gaining in popularity. A total of 371.8 million mobile devices were shipped in Q1 of 2011, compared with 310.5 million units in the first quarter of 2010.

In terms of overall market share, Nokia remained in the lead with 29.2%, followed by Samsung, LG, Apple and ZTE.

This week's podcast returns to the subject of iPhone tracking before moving on to BlackBerry news, Nokia's reorganisation and mobile payments. There's also a look back to 2008, when virtual network Blyk announced its first 100,000 UK customers.

HTC Corporation has announced results for the first quarter of 2011. After-tax quarterly profit was NT$14.83 billion, up 196.8% year-on-year, while revenue had grown for the fourth consecutive quarter since 1Q 2010 to reach NT$104.16 billion, up 174.5% year-on-year.

9.7 million handsets were shipped in the first quarter, up 192% year-on-year and up 6% on the previous quarter.

Motorola Mobility Holdings has released its first quarter results for 2011. Revenue was up 22% year-on-year to $3.0 billion, with the mobile devices part of the business generating $2.1 billion. It's still losing money but overall losses were down.

The company shipped 9.3 million mobile devices during the three month period, including 4.1 million smartphones and more than 250,000 XOOM tablets.

Samsung Electronics has announced its results for the first quarter of 2011.

Revenue was up 7% year-on-year to 36.99 trillion Korean won, net income was down 30% to 2.78 trillion won and consolidated operating profit was 2.95 trillion won.