Yes, users can generally keep their existing phone number when switching to Expo Mobile. This process is called number portability, which allows individuals to transfer their current phone number from one carrier to another. In order to successfully complete this transfer, it is essential to have your account information from the current carrier, such as the account number and any relevant PIN or password associated with the account. It is also advisable not to cancel your service with your current carrier before the transfer is finalized, as this could lead to complications. Each situation can vary, so it is wise to refer to Expo Mobile's official website for detailed instructions and requirements related to number portability. You will find specific information there that will guide you through the process efficiently.