If you purchased your subscription through watch.smithsonianchannel.com you can update your credit card information on the website:
- Go to watch.smithsonianchannel.com and sign in
- Use the settings icon in the upper right corner to navigate to your account
- Select ‘EDIT’ next to Payment Method and follow the instructions
If you purchased your Smithsonian Channel Plus subscription through Amazon, Android, Apple or Roku®, you will need to update your payment information directly through your billing partner.