You cannot change your mobile number from within the app. To sign into your existing Howbout account with a new number, follow the below steps:

1. Sign out of your Howbout account
2. Enter your new mobile number when prompted at login, and enter the verification code sent to your new number
3. Enter the email address linked to your Howbout account, or continue with Google or Apple if that's how you previously signed in
4. Enter the verification code sent to your email address
5. Enter your password to log in

If you do not have access to your email address, or can't remember your password, please email support@howbout.app.