Yes you sure can bring a number into RingRx from another phone company. This process is called a “Port” and we do it regularly as part of our service to our customers. We do not charge for porting (most companies do).
After you sign up for a trial or are already have a paid subscription, we are happy to start a port anytime.
To get started porting your number right away, please go here and fill out the form
You can learn more about porting here