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The following is Wireless Handheld  BlackBerry 7100i  Version 4.1 Troubleshooting and User Guide. BlackBerry is a line of wireless handheld devices first introduced in 1996 and manufactured by the Canadian company Research In Motion (RIM). RIM expanded the market by introducing the first BlackBerry models without a discrete QWERTY keyboard, in the candybar form factor. They developed a predictive text technology called SureType with a QWERTY-like layout, using two keys per button.

here to download BlackBerry 7100i User Guide