It's too complicated to explain on here and if you are not in the UK I'm not sure if it's the same way in another country. But you could try following these details from Lexus. https://www.lexus.co.uk/content/dam/lexus/nmsc/united-kingdom/owners/about-your-lexus/lexus-link/pdfs/Activation-Guide-MM21-Lexus-Link-Pro.pdf