The BlackBerry is a wireless handheld device available on about 300 networks in 120 countries. It supports push e-mail, mobile telephone, messaging, web browsing and other wireless communication services. (Reporting by Maria Kiselyova and Anastasia Teterevleva; writing by Maria Kiselyova) - MOSCOW, Nov 27 - Two top Russian mobile firms, MTS and Vimpelcom , said on Tuesday they would start selling Research In Motion's BlackBerry phones in Russia after reaching a compromise with state security services.

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