@YNechad Thank you very much for the update, glad to hear that you've solved the problem. Hope you could enjoy the internet.

@dave1605 Hi, for 4G+ issue, please refer to this thread: Carrier Aggregation or 4G+ doesn’t work properly on LTE Advanced Router

@Yashubhai Hi, may I know who the ISP is? If it is Jio SIM, please refer to this thread: Can’t send and receive SMS on TP-Link 4G Routers with Jio SIM card

@mahat Hi, do you mean it was purchased from a local store instead of the ISP BSNL? If so, please contact the local support team for help: Contact | TP-Link

@COfit Hi, are you trying to separate guests devices and IoT devices from other regular devices under main network? If so, you could consider enabling Guest Network and let guests and IoT devices to...

@Narc Noted, thanks a lot for letting us know, hope the issue can be located and resolved soon.