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Samsung D780 DuoS (SGH-D780)

 Samsung D780 Discontinued
30th April 2008

The Samsung D780 DuoS is one of a very small number of mobile phones that is designed to accept two SIM cards at the same time. It's a very conventional looking monoblock device, broadly similar in specification to the existing D880 DuoS.

We have explored the DuoS's technology before, but essentially both SIM cards are active at the same time, and the DuoS has two handset profiles with different settings for each. Users can choose which SIM to use for voice calls and data, and contacts and SMS messages are stored separately. There is very little functional difference between a DuoS handset and carrying two phones about.. except with the Samsung D780 DuoS you will only need the one handset.

 Samsung SGH-D780 DuoS Apart from the dual-SIM support, the Samsung D870 DuoS is an utterly conventional GSM phone. It has a 2.1" 240 x 320 pixel display, a basic 2 megapixel digital camera, microSD expandable memory, an FM radio, stereo Bluetooth, a USB connector, plus a multimedia player, web browser and email client.

Samsung don't say how much the D780 weighs, but it does come with a large capacity 1200 mAh battery which will add to the weight slightly. Because there are two distinct GSM/GPRS radios in the SGH-D780, it will tend to require more power to run. It's a small trade-off for convenience though. At 115 x 50 x 16mm, the D780 is perhaps a little larger than a single SIM device too.

One drawback is that the Samsung D780 is a tri-band GSM 900 / 1800 / 1900 device only, although it does support EDGE data as well as GPRS. Samsung are working on other DuoS handsets, although we suspect that a dual-SIM 3G device may be some way off.

The Samsung D780 will be available in Russia and the Ukraine from May 2008 at a price of around €260 (£200 approximately), followed by Europe, Asia and the Middle East. This is about the same price as the existing D880 DuoS slider.

One serious drawback is that if you want a DuoS handset, you are probably going to have to pay the full price for it. Dual-SIM devices don't really fit into the business model of most cellular carriers, but we suspect that people who want the DuoS features will be prepared to pay for them.

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Samsung D780 DuoS (SGH-D780) at a glance


May 2008


GSM 900 / 1800 / 1900




240 x 320 pixels, 262k colours


2 megapixels


Medium monoblock
115 x 50 x 16mm



Memory card:










Battery life:

Not specified


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