To update your phone number, simply sign in to Your Account and select EDIT PROFILE & ALERTS (yellow button at the top of the page). This will bring you to the PG&E Preference Center. From there, scroll down to Contact Information and select Email, Phone & Language. Scroll down to Phone Numbers and replace the phone number listed with your new phone number. Select SAVE CHANGES at the bottom of the page when you are finished.
Please note that Visitor/One-Time Access does not provide full access to your contact information; you will not be able to update or delete your phone number while using Visitor/One-Time Access. To do so, you must sign in to Your Account using your username & password.