Apple's admission that its iPhone 4 has reception problems when held a certain way – and its insistence that other manufacturers have the same issues – has prompted angry responses from other manufacturers. We've heard comments from HTC, Nokia, Motorola and Samsung… and the co-CEOs of RIM (Mike Lazaridis and Jim Balsillie) have published a joint statement on the company blog:

Market research company iSuppli says 79.9% of mobile phones shipped in the last quarter of 2011 – 318.3 million devices – will include GPS functionality. That's up from 56.1% in the first quarter of 2009.

The company says smartphones are taking over from dedicated sat-nav devices as the major platform for navigation. By 2014, usage of navigation-equipped smartphones is expected to exceed that of personal navigation devices.

Apple held a press conference yesterday evening in an attempt to draw a line under recent 'antennagate' complaints. The new iPhone 4 has been criticised for a dramatic drop in signal strength when it's held in a certain way; a problem the company says is a combination of software fault – signal strength wasn't being displayed accurately – and a hardware design issue that affects all mobile phones.

Chinese mobile phone manufacturer ZTE Corporation has launched its first Android-powered smartphone in the UK. It's co-branded by Three and is selling on 'pay as you go' tariffs for £99.99.

The ZTE Racer runs Android version 2.1 (Éclair) powered handset. It offers a 2.8-inch QVGA touchscreen, 3.2 megapixel camera, 256MB of internal memory, Bluetooth and 7.2Mbps HSDPA connectivity.

Mobile telecom author and commentator Tomi Ahonen has published a lengthy blog post covering smartphone segmentation: which people use smartphones - and why they use them.

In it, he anticipates around 35% growth in smartphone shipments this year (excluding Japan), with most growth coming from lower-priced handsets. Headline figures include...