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Explain how synchronization takes place with Blackberry Technology

The handheld device is used as a network device, which always connected to the data account of the user via redirector software. The software is installed on the BlackBerry Enterprise Server. The communication between the software, BE Server and the hand held device's software is always a two-way street. BES immediately updates the mobile device or the email or the calendar account, whenever a change in email account occurs. 

The push technology of BlackBerry keeps the device instantly in ''synch'' without any effort by the user.