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Resetting your Phone
Resetting your phone will remove all the data from the its memory which include contacts, tasks, calendar appointments, and more, and restore the phone back to the factory default settings.
To reset your phone
1. Click Start > Accessories > Clear Storage.
2. Follow the on-screen instructions to reset the phone.
The phone will restart after it has been reset.
Always re-insert the battery immediately while replacing it. Data may be lost if the battery has been removed for a long time.