MFA cannot be transferred from one device to another. If you get a new phone — for any reason — you must remove MFA from your account before switching devices, then set it up again on the new phone.
If you switch phones without removing MFA first, you will be locked out of your NCU account. You will need to contact the IT Service Desk at 612.343.4170 to have MFA reset before you can log in or complete setup on the new device.