You will need to do a 'hard reset' this involves pressing the reset button (located at the back of the router) for at least 1 minute, this will delete all stored data from the router and bring it back to factory setting.
Hands-on: Samsung Galaxy Note 8 review
Be inspired by powerful National Theatre posters from the past 50 years
How to use the new Photos, Notes and Safari features in macOS High Sierra
Galaxy Note 8 : design, caractéristiques techniques, date de sortie