Economic way to port office cell phone number

Your employer is paying for the phone number now, it is associated with their corporate account, you want to leave the employer and keep the number? I am pretty sure that is not possible. If it were possible, it would have to be with the employers consent, and there's a million reasons for them to say no

Several companies allow employees to take number with them when they leave. Intuit even let's you keep your device. If your company allows that , One way to keep number is to port it to Google voice and forward to new number.

Tell the carrier that you want to port a number. They do it for you.