Here are the problems:
1. Open app
2. "Get Started" screen.
3. Permissions.
4. Select device, ISP cable without Wi-Fi.
5. SB8200.
6. Xfinity.
7. Activate, Skip.
8. I'm Online.
9. Scan bar code.
S/N 21C541334702536
mac F8790A27EA4D
10. REGISTRATION GOOD.
App shows modem and router.
If app is closed or another opened then surfboard app reopened, go back to #2.
If add new satellite selected, pressing next does nothing.
Restart router button works.
Tapping WAN settings closes app then back to #2.
Software
Arris SURFboard Central
Ver. 4.0.10
Modem
M/N SB8200
S/N 21C5 4133 4702 536
mac F8 79 0A 27 EA 4D
Router
M/N W31
S/N 94D3 J945 5100 398
MAC 74 8A 0D FF A7 25