Aside from these issues already mentioned there are a few smaller flaws that might annoy you. For example, there are only two skins (also known as themes) that you can set to either black or white, and you're limited to ten message tones without the choice to add your own.
You also can't set MP3 ring tones to vibrate and only certain tones will ring and vibrate at the same time.
Samsung has come up with a natty way of navigating menus, however. As you scroll through the list of options, a window pops up listing the options on the submenu. Pressing the number relating to the submenu option takes you straight there, which speeds things up slightly.
Other features of note are the speakerphone mode, Bluetooth, SMS and MMS messaging, a voice recorder, polyphonic ring tones, a calendar, a to-do list, a scheduler, a clock, world time, an alarm, a timer, a stopwatch, a calculator, a currency converter and Java games.
Performance
The battery life is quoted at 2.8 hours talk time and 295 hours standby time. We found that it lasted for about two days before we had to recharge it.
Audio quality during calls was loud but not always crystal clear. The audio quality from the music player was acceptable, but as you're stuck with using the provided headphones you can't expect much better. The speakerphone mode sounded tinny and not particularly clear.
The 2-megapixel camera took relatively decent pictures if you intend to send them to other phones via MMS or Bluetooth, but when viewed on a computer screen they invariably looked blurry.
Conclusion
If you're looking for a thin and stylish slider phone, then the D840 is worth checking out, but overall we don't think it's as cool as the LG Shine. Features-wise, the Samsung D840 didn't really impress us, especially if you compare it to Samsung's other thin slider phone, the D900.
Indeed, the D840 shares a similar feature set to the Samsung X820, minus the expandable memory card slot. If it's a thin phone you're after we think it's worth looking at the X820, which measures a minuscule 6.9mm thick and will practically do all the things the D840 can do.
Alternatively, if it's an envy-inducing fashion phone you're after, then you might want to check out the LG Prada.
Edited by Jason Jenkins
Additional editing by Nick Hide
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