Yes, you need to perform a hard reset.
To perform a hard reset
1. Press and hold the Comm Manager button and Voice Command
button on the device. At the same time, use the stylus to lightly
press the RESET button.
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2. Keep the Comm Manager button and Voice Command button
pressed, and the following message will appear on the screen:
T-Mobile MDA Vario hard reset soft reset hardreset softreset
3. Release the two buttons, and press the Send button to perform a
hard reset
.
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