@Souvik30 Have you referred to this setup guide to configure the QoS for the primary device? https://www.tp-link.com/support/faq/2693/ If the issue persists, can we have a screenshot about the QoS...

@EnzoConqueror What is the model of the main router? Does this C80 connect to that router wireless successfully via WDS? As far as I understand, the C80 connects to the main wireless via the virtual...

@Djkhalid What is the current firmware on the MR100 web page now? Is your SIM card carrier also Airtel? Please confirm what is the Status on the web interface page when the internet disconnects on...

@Inc42 Thank you very much for sharing the solution with the community, it's glad to know that the engineers helped locate the issue, and the issue is resolved. Just to notify, we also illustrate...

@balangaman Thank you very much for your kind explanation. I understand it now. Please also make sure you are tagging a TP-Link Admin if you want a timely response. Unless we are tagged, we do not...

Thanks @_hhh_ for your kind suggestions and detailed guidance. @boombastic we would confirm this on our end, and we will get back to you ASAP.