You've updated the firmware via the app? does your cam have solid green light? May reset it and try again

From Live view of your camera on the app you heard sound that doesn't corresponds to the live image? That's weird......Cant image how that's possible. Maybe you can send someone to check if something...

If the modem works fine, never mind that. ;)

Verify with sse all parameters are correctly entered on the modem, like VPI/VCI or VID, wan connection type, broadband username and password.

You have to restart the modem to fix it? What's the light status before restart? Access the modem's admin interface to check its internet status. If you cannot login, the modem may be down. Check the...

Where do you see workgroup on the router? I don't see it