Samsung Galaxy S Duos also known as GT-S7562 is a dual SIMsmartphone, designed and marketed by Samsung Electronics. In contrast with other dual sim Samsung models, this phone is a part of the high-end "S" series, this is why it is marketed as a part of the "Galaxy S" family.
The phone also comes with Android 4.0.4 Ice Cream Sandwich, along with Samsung's proprietary Touchwiz interface.
Unlike entry-level dual SIM models from Samsung, the Galaxy S Duos is active on both SIMs all the time so it is ready to receive calls on either SIM when a call is not already in progress. Optionally it can receive two calls simultaneously, but this requires divert-on-busy to be set up on each number and is subject to availability from the carrier and may incur additional charges. A limitation of the Galaxy S Duos is that only one SIM can be active on UMTS (and therefore data) at a time and so it may be unsuitable for certain combinations of networks.
China Unicom offers the Galaxy S Duos as the GT-S7562i, which is essentially the same phone as the international version, and a variant called the GT-S7562C which omits the proximity sensor.
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