@James-J Hi，may I know the carrier name of your SIM card? Please refer to the troubleshooting steps here to see if problem can be resolved: https://community.tp-link.com/en/home/forum/topic/273224 If...

@PeterRajmond Hi, may I have a screenshot of Advanced->Status page? Besides, you mentioned that the same SIM card works on smartphone, please check the network type and band working on the phone with...

@Febilien Hi，may I have a screenshot of Advanced->Status page and Advanced->Network->Internet page? If you insert the same SIM card into another 4G device such as smartphone, will it still work fine?...

@Lookapl Hi， 1. please provide network topology, VPN Server is on MR150 side or remote side? 2. What VPN are you using? PPTP VPN, OpenVPN? 3. The VPN is connected, right? please check if you are able...

@baldman Hi，thank you very much for the reply. The MR150 router is at home or at company? And are you able to ping the file server on the OpenVPN Client? Please also let me know the version of your...

@Jordan75 Hi, thank you very much for the feedback. May I know if the hardware version of your MR6400 is V5 or V5.20? please check it on the bottom label of the product itself. If it is V5.20, please...