The Samsung D840 is a member of Samsung's topmost mobile handset line up – the Ultra Edition. Before the devices' release, Samsung had already announced the Samsung D900 as a flagship product. Therefore, the Samsung D840 is launched as an intermediate product between Samsung D900 and the lower models of the D series. This strengthen Samsung's portfolio, giving more option to a customer. Design wise too, the Samsung D840 resembles the D900 and at times it is even hard to distinguish between these two.

The handset comes in a sleek black casing with glossy finish, in slider form. Opening the handset reveals the flat but conventional keypad that looks and works great at the same time. The screen used in the Samsung D840 is TFT based that can produce more than 256k different colours to produce the most life like images on it. At 2.12 inches, the screen is very large for handset with its size. The Samsung D840's petite dimensions – 99x51x11.9 mm and its weight of 100 grams is easy on any of your pockets.

The handset is fitted with a 2.0 megapixel camera capable of shooting pictures with resolution as high as 1600x1200 pixels. Enriched with advanced mobile imaging aids like digital zoom and flash light, shooting stills and videos with the Samsung D840 is a pleasure. The handset also gives you the option to share your pictures and videos with anyone you care via MMS, Email and even picture blogging after you transfer them to your PC via Bluetooth or USB.

The Samsung D840 supports triband GSM networks and changes bands automatically. This means one can hop around in hundreds of countries across five continents without thinking twice about voice network coverage. Even in terms of data connectivity, the Samsung D840 provides its user with faster mobile Internet using its embedded class 10 GPRS and EDGE technologies.