The Sony Ericsson K770i is an elegant and sophisticated mobile phone which comes in a stylish casing. It is a 3G enabled mobile phone. This is a light weight mobile phone and weighs just 95 grams with a sleek dimensions of 105 x 47 x 14.5 mm, which provides you with a compact and well adjusted bar type handset. The handset is a strong bar type handset which feels good to hold in the users hand due to its soft, curved design and smooth edges. The mobile phone comes with a beautifully designed keypad which is easy to use. It comes with a 1.9 inches TFT screen which provides the users with a bright and vibrant display of up to 256K internal colours. The screen has a resolution of 240 x 320 pixels. The mobile phone comes in a selection of colours which include Truffle Brown, Ultra Violet, Sandy Beige, Soft Black and a striking Henna Bronze.

The Sony Ericsson K770i comes with 16 MB of internal memory and the users can easily extends its external memory by adding a Micro (M2) memory card. It comes with an easy to view camera interface which lets the user to view user-friendly camera icons in an instant and a user can access his photos easily. The handset comes with a high quality 3.2 mega pixels camera with attractive features such as autofocus, LED flash and Cyber-shot camera technology. The phone camera comes with an integrated lens cover, which works as a camera lens protector besides providing the users to to access the camera feature directly by opening the lens cover. You will be puzzled how easy it is to give their photos a good finish with this phone's photo fix technology which allows you to give the best finished touch to the still images. The phone also facilitates video recording. It has a secondary VGA camera which allows the user to make videocall streaming all over the world with the support of 3G network technology. The video call provides the user with a fun way to communicate with others who have video calling capabilities on their handset.

The media player of this phone supports various types of audio/video formats such as MP3/AAC/MPEG4 files. The phone has supports TrackID music recognition technology, which lets the users to record a sound clip of an unknown music track onto their handset and immediately receive a notification of the track name, artist and album. The phone has a various connectivity options such as GPRS class 12, HSCSD and 3G technologies that allow the users to connect their devices to the internet without hassles. The users can access to the internet using the NetFront web browser which can be accessed from the main menu. It has USB v2.0 and revolutionary Bluetooth v2.0 with A2DP technology that allows you to share personal data, images, sound clips and video clips with other Bluetooth compatible devices at a high speed. The users will find that the K770i is a highly capable mobile phone which provides the users with fast multitasking technologies. The users can send & receive messages on their K770i in the form of text messages, MMS (multimedia messages) and e-mails. The MMS service allows the users to create a message complete with text and sound with either a photo or video attached.

The Sony Ericsson K770i has some other useful functionalities such as Java MIDP 2.0, RDS FM radio, Image viewer, Picture blogging, Organiser, Voice memo/dial and Built-in handsfree which make it a multi-purpose mobile phone in the mobile phone market. The standard battery Li-Po 930 mAh (BST-38) gives about 400 hours of standby time and long 10 hours of talktime, respectively. Thus, it is a great mobile phone in the present day phone market.