1/12/2006

Several companies including Microsoft, Motorola and Nokia are rising up to challenge Research In Motion's dominance in the wireless e-mail market. RIM says its sales and shipment numbers look "very strong," and adds that some device makers offer BlackBerry compatibility, an intangible that could keep the juggernaut rolling along. A wild card in the mix is uncertainty over the possible shutdown of BlackBerry service in the U.S.

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