Before beginning the porting process, make sure you have reviewed the terms with your existing service provider. If you are in a contract, there may be early termination fees. Also, be sure that your account is in good standing before starting to port. If you have an outstanding balance, your previous provider may choose to terminate your service and release your number before the port is completed.  Finally, be sure to check if your business number is portable. In rare instances, a number may not be eligible for porting.