Yes, it is generally possible to keep your current phone number when switching to Optus for your business. This process is known as "porting" your number. When you decide to switch to Optus, you will need to provide certain details, such as your current account information, to facilitate the porting process. It is essential to ensure that your current phone service is active during this transition. The porting process typically takes a short time, often just a few hours, but it can sometimes take longer depending on various factors.
Additionally, it is advisable to confirm with Optus about any specific requirements or documentation needed for porting your phone number to their services. You can also visit their website for further information on the number porting process and any other associated costs or conditions. This will help you make an informed decision regarding your transition to Optus.