Yes. The forwarding number on your InmateAid account points calls to whatever phone number you designate, and that number can be updated when your situation changes. Email aid@inmateaid.com with your account details and the new number you want calls forwarded to, and the team will make the change.
This is worth doing promptly. If the forwarding number on file is no longer active, calls from your inmate will not connect and he will not know why. Updating the number quickly avoids that gap and keeps the communication uninterrupted.