The great thing about mobile phones built around a Linux-based OS is that they can run a number of extremely useful applications.

The Motorola A780, for example, comes complete with a bunch of very useful tools pre-installed, such as a viewer for files like Microsoft Word and pdf documents, a voice recorder and a mobile version of Realplayer.

In addition, the A780 features a built-in GPS receiver and comes with Copilot Live satellite navigation software on a 256MB memory card. Copilot is a fine navigation program that comes with detailed roadmaps of the UK, Ireland and mainland Europe.

The A780 uses a stylus and touch-screen-based input system, which makes it extremely easy to operate. All applications, particularly the sat nav system, benefit from a very bright, colourful 2.5in TFT display.

Not only that, but the Linux-based software that runs the phone helps to make operation fast and smooth.

There’s no 3G or Imode here – just standard GPRS. The A780 is quad-band, so it should pick up a network however far it roams from home.

It’s also compatible with Edge networks, which, claims the manufacturer, can increase download speeds up to three times that of standard GPRS.

Chuck in Bluetooth, a 1.3megapixel camera and Java for 3D gaming, wrap it up in a neat clamshell and you’ve got a pretty smart smartphone.

The downside is that all the A780’s exciting music, photo, video and route planning activities take a heavy toll on the handset’s battery life.

Using the dashboard mount and cigarette lighter power adaptor means it’s not a problem in-car, but when it comes to extra-vehicular activity the battery runs out fairly quickly.

Our test unit needed a recharge after just two or three of days-worth of fairly standard usage.

Despite the poor battery performance, the A780 is a decent phone that packs a heap of features.