The Sony Ericsson W850i is the first slider phone from Sony Ericsson. Despite being their first attempt at slider, Sony Ericsson managed to create a slider with smooth sliding action and a hidden slide mechanism – a first among all mobile phones. The Sony Ericsson W850i is available in two colours – Precious Black and Golden White. While the black solution is popular across all customers, its golden white variant is specially popular with the ladies. The white model sports a real gold Walkman logo that adds 'bling' to the handset.

The Sony Ericsson W850i is among the first 3G Walkman phones. The handset is capable of making and receiving video calls across UMTS network. Under optimum condition, the handset can get you data speed as high as 384 kbps. GPRS for data connectivity in non 3G networks, Bluetooth, infrared and USB for local exchange and synchronization of data – the triband Sony Ericsson W850i has more ways to connect you to the world than you can think. The handset also features a 2.0 megapixel camera and a secondary VGA camera to aid video calls.

The Sony Ericsson W850i is among the high end Walkman phones and sports the same upgraded Walkman media player v2.0 as in other Walkman phones like the W880i, W950i and more recently the Sony Ericsson W950i. The new media player incorporates many new features while maintaining the popular older ones. While you will find no changes in the player's graphic equalizer, play-list support and other functions like TrueBass, new features like Track ID music recognition is aimed to make for a supreme Walkman mobile music experience. The handset's internal memory pool of 16 Mb is paltry for such a powerful music device, so is compensated by a supplementary card that is shipped with a regular Sony Ericsson W850i kit. Enjoy your music on a wireless Bluetooth stereo headset or on your preferred conventional pair by plugging it to the 3.5mm audio jack adopter. With Sony Ericsson W850i, its your music in the way you like it.