To update your payment information with Selectel Wireless, you will typically need to log into your account through their website. Once logged in, navigate to the account settings or billing section, where you should find options for managing your payment methods. This may involve entering new credit card information or updating your billing address. Ensure that you save any changes you make before exiting the page. It is always advisable to double-check the new information for accuracy to prevent any disruption in service. If you encounter any difficulties during the process or if you have specific questions about your account, you might find more detailed instructions or assistance on Selectel's current website.