@Sherozeali_qazi What do you mean by thread router? Is it another brand? If you cannot login to the TP-Link router, it's recommended to follow the troubleshooting suggestions here.

@siealex That sounds weird. Have you tried to reset the router to factory defaults and reconfigure it from scratch? Give it a try and check if you can bring the 5G back. If the issue is still there,...

@Marregino Maybe you can try the suggestions in this thread, it seems some of them solve their Netflix issue by MAC clone. You can also try resetting the C80 to factory defaults and observe if that...

@sergiuo It seems the firmware is not the latest, try upgrading to the latest official version first, then check again if you can see the wireless signal. If nothing helps, I would recommend...

@RTMC AX72 should be designed for ceiling-mounted, but you may need to pay attention to the antennas, it would be better to put them horizontally when ceiling-mounted as per this FAQ.

@Debasisdas1993 You can refer to this thread to get the password.