As far as tablets go, not many of them have been designed to be an out-right extension of a smaller device, like a smartphone. Many manufacturers have brought them to market to stand as their own device, unhindered by the necessity of being tethered to another device to have primary functions. For the BlackBerry PlayBook, the first tablet device from Research In Motion (RIM), one of the major complaints about the device is the requirement that it be connected to a BlackBerry smartphone for some features to function.
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