@User9739 Hi, thank you very much for posting on TP-Link community. Please follow this guide to troubleshoot: What should I do if I cannot access the internet through Wi-Fi router?

@donzel Hi, you are correct, the 3G/4G Backup is only for internet, telephony service doesn't support fallback, you could use only one telephony service, either VoIP or VoLTE.

@acerfly acerfly wrote @Sunshine Hello, today I had a disconnection problem with the MR500 when I requested a high level of traffic (windows update and other simultaneous links). The question is...

@Fatals Fatals wrote @Sunshine Thanks for this beta firmware. So far it has proved quite stable for me connected to Vodafone UK 4G+. There is one issue with this firmware which is that it seems to be...

@xianrenzhang Did you try the beta firmware provided in the original post of this thread? If the problem still exists after installing the beta firmware, please provide the following information, we...

@ekran0plan @Skugnizzo If the problem still exists after installing the beta firmware, please provide the following information, we could escalate the case to our senior engineer for further...