The 6110 Navigator is the first mobile phone to be released with full turn-by-turn GPS navigation out of the box, and despite some small issues, it's an excellent experience on the whole.

The BlackBerry Curve 8310 adds GPS to an already enticing unit. Its only real drawbacks are the lack of Wi-Fi and 3G connectivity.

The S90i is Navman's cream of the crop, and it is certainly a fine unit. The 2-megapixel camera adds flexibility for using NavPix.

The C720t is very similar to the successful C520, so it remains a great unit with plenty of features. Unfortunately, the geotagging feature is poorly implemented, so we're not convinced this is worth the extra cost over its little brother, though the included TMC cradle kit is ideal if you are planning to use the traffic feature.

The BT-Q1000 does what it claims: it'll track your movements very accurately, as well as record places of interest at the press of a button, and map them on Google Earth. It can also be used for navigation when paired with a PDA or notebook computer and GPS software. However, its software interface will confuse the uninitiated.

The p3600i is a feature-packed device and the scroll wheel makes navigating through it an effortless job.

It may have a hefty price tag but the Triton 2000 offers plenty of features. The touch screen makes this device much easier to use than units that only have a navigational pad.

If you don’t consider a QWERTY keyboard a necessity, then the E66 is one of the best smartphones on the market. It combines a stylish design with the latest features and it is a breeze to use.

The E71 is one of the most stylish smartphones on the market. If you can get by with a slightly small display and keyboard, this beast offers plenty of features and grunt.

If you currently own a GO 720, then there is no real reason to upgrade, as most of the improvements are software upgrades. If you are looking for a high-end GPS with all of the latest features though, the GO 930 is excellent, if a little overpriced.

Although the S150 doesn't have all of the features of its more expensive sibling, Bluetooth hands-free remains, as does the excellent navigational experience.