Google-owned Motorola has revealed a new smartphone that it describes as ‘an exceptional phone at an exceptional price’.

The Moto G has a 4.5-inch HD screen and runs Android 4.3 on a quad-core Qualcomm Snapdragon 400 processor.

BlackBerry has completed the $1 billion (£622 million) investment it announced earlier this month.

The deal - described as a private placement of convertible debentures - was arranged with shareholder Fairfax Financial Holdings and other investors.

Ashley Gilmour writes:

A quick fact: nearly half of Facebook’s advertising revenue now stems from mobile ads.

That’s right – of the social network’s $1.8 billion (£1.1 billion) generated in the third quarter of 2013, 49% of it was made up of mobile advertising revenue. Last year, the channel represented only 14%.

The past few days have been a good time for launches. Twitter has floated on the stock exchange, Kazam has revealed its smartphone range and EE has created a tariff with a million gigabytes of mobile data.

On the other side of the coin, Acer's CEO is quitting, Vodafone UK has missed its 3G coverage target and hackers can take control of your handset's camera to ascertain PIN codes.

Rachel McCormack writes:

Mobile point of sale transactions (mPOS) are growing in popularity as mobile use takes over from desktop computers. The description of ‘mobile’ point of sale transactions denotes the ability of a payment to be taken via smartphone or tablet rather than a traditional card reader. There are many different ways to do this; mobile chip & PIN, mobile swipe & sign and NFC payments. All of these methods vary in popularity and security conceptions and many are difficult to understand. In this article we will explore each and give you the chance to understand the technology and issues surrounding the various methods.