Before getting started with the Garmin Zumo reset it is advisable that the user manually restarts the device after that for conducting a reset first of all turn off the Zumo and get the power cable disconnected from the device after that keep your finger in the lower right corner of the screen then release the power button as it turns on then as you see the message “do you really want to erase the data?” then release your finger from the lower right corner then click “yes” and for more info: visit at Garmin Helpline Number Uk & http://www.garmincustomerservice.co.uk/