Valora will map your phone number to your wallet address when you go through the connection process. This can be done multiple times, meaning multiple wallet addresses can be mapped to a single phone number.
When you try to send to a phone number that is attached to multiple wallet addresses, you will be prompted to go through Secure Send. This will ensure you are sending funds to the correct Valora wallet. This confirmation happens only once, and Valora will remember which wallet address you picked.