The Sony Ericsson M600i is a 3G phone with tri-band GSM (900/1800/1900), expandable memory (using Memory Stick Micro cards), plus a full range of applications including the Opera web browser, an email client, and multimedia player. Plus the M600i comes with a jog-dial control in addition to the touchscreen, as does the larger P900 series.

This unassuming looking handset is, in fact, the smallest and lightest 3G phone that we’ve ever seen. Weighing just 85 grams, the SGH-Z330 comes with a 1.3 megapixel camera, a secondary camera for video calling, 1.9″ 176×220 pixel display, 140Mb of embedded non-expandable memory, Bluetooth, an MP3/multimedia player, email client and web browser. Although some features have been sacrificed to make the SGH-Z330 a lightweight device, it’s still an impressive little handset, with a decent enough camera and plenty of memory to be useful.

Positioned one notch above the lightweight Z500 3G phone in Samsung’s range, the SGH-Z520 has a 240×320 pixel display main, 2 megapixel primary camera, 40Mb of internal memory with microSD expansion, and MP3/multimedia player, inbuilt “digital power amp” and Bluetooth. There are external media controls too, so the Z520 can be used as an MP3 player when closed.

This swivelling clamshell comes with a 3.2 megapixel camera, a 2.2″ 240×320 pixel display, Bluetooth, 128Mb of internal memory with microSD expansion, an MP3/multimedia player, FM radio and TV output. Being a “Z series” handset, this is also a 3G phone.

There are a few camera phones around like this – designed to look as much like a dedicated camera as well as a phone, and the Z710 certainly looks the part, although there’s no optical zoom on this device. Physically, the SGH-Z710 measures 96×48x20mm and weighs 107 grams.