You can easily change your account details and payment method through the app in the menu ‘Me’ and choose 'Payment method'. Or make changes via My Fastned through the menu ‘My Account’.
Don't know or forgot your phone PIN?
If you want to log in with your phone number but have forgotten your PIN: you can always order a new PIN by sending (from your phone) the text message PIN to +31642500542 or call the customer support. This will reset your PIN and send the new one to you via text message.