How To Factory Reset a Garmin nuvi 310

  1. Start with the device OFF and unplugged from the power source.
  2. Use your index finger to press and hold the top right corner of the touchscreen.
  3. Power the device ON while continuing to press and hold your finger to the top right corner of the touchscreen.
  4. After the device powers ON, you will see the message: Do you really want to erase all user data?
  5. When this message displays, remove your finger from the top right of the touchscreen and touch Yes.
  6. The device will now go through the Reset.
  7. Follow the onscreen instructions to set up your nĂ¼vi.