Have no idea. Just a suggestion.

Have you tried to turn it off via web GUI or Tether app ?

@VfV I understand your frustraition - a normal person woild like to just setup and use the device instead of spending 2 hours a day in troubleshooting. But I really don't know how to help in your...

Try adjusting the MTU size for now to see if that will improve the stability of the C6 Internet connection. If that doesn't help then contact the local support and explain the iInternet port...

Correct. Do you still own the Tenda device you mentioned earlier ? If yes, you could test with that to see if the connection is stable and copy all the Internet port parameters including MTU. Then...

@Shanky2201 From what I can see in your screenshots, your Internet connection has dropped briefly and then recovered. Call your ISP and ask them if they can advise on that. Since you're with static...