The Sony Ericsson K550 is a mid range mobile phone.

Announced on February 6, 2007, it was the successor of the K510 model sensor with two-LED photolight and an active lens cover for the camera lens protection and easy camera activation when taking pictures from the phone.

The phone was one of the first Sony Ericsson models in which the user can find the Fast-Port system connector at the left side instead on the typical bottom part.

The K550i design is similar to other models in the cyber-shot range, but it is slimmer than some of the other K series phones (such as the K790 and K800).

Its keyboard layout is also redesigned relative to those models Just like its fellow Sony Ericsson models since the K750/W800/W810, the K550 can be modified in various ways (such as modifying its camera driver to improve camera image quality or acoustic driver for better sound reproduction).