If you receive the error message "A user with this phone number has already been registered" while setting up your profile, it means that your phone number is already associated with another account.
Solution
To use your phone number with your intended account, you need to delete the existing account associated with that phone number:
Sign in with your phone number: Go to https://www.meterapp.co/signin. Enter your phone number and follow the verification steps to log in.
Delete the existing account: Once logged in, go to https://www.meterapp.co/account. Scroll down and click the Delete Account button. Confirm the deletion.
Log in to your intended account: Sign in to your primary account where you want to use the phone number. Navigate to the settings or profile section and link your phone number.