System

The system has the following 5 selections:
- In the Home Only system, the phone only operates when you use the phone in the cellular service in which the phone was originally registered.
- In the A Only system, the phone only operates when the phone uses the A side of the system.
- In the B Only system, the phone only operates when the phone uses the B side of the system.
- In the A then B system, the phone attempts use of the A side. If the A side is not available, the phone switches to the B side.
- In the B then A system, the phone attempts to use the B side. If the B side is not available, the phone switches to the A side.