@Matfen Hi, welcome to the community. I'm afraid Archer MR400 doesn't support working as a Wireless Bridge or repeater. Best regards.

@susanta151 Hi, may I know how long you have had the Archer MR600_V2? If you factory reset MR600 once, will the WiFi LED turn on later? Wait for your reply. Best regards.

@alatalla Hi, thank you very much for the feedback. Is the 5G router provided by the SIM ISP? Did your mobile phone, as well as NX510V use SIM cards from the same carrier? Can I have the name of the...

@Manohar_0404 Hi, did you use the beta firmware here: https://community.tp-link.com/en/home/forum/topic/604130 Before updating the firmware, can you have internet access with the JIO 4G SIM? Wait for...

@isura Hi, can I have the firmware version of your TL-MR100? -If you are on V2.0, it is also suggested to test the beta firmware here:https://community.tp-link.com/en/home/forum/topic/604130 Please...

@BPCS Thank you very much for the update. In this way, I'd like to follow up on your case via email and ask the senior engineer for more advice. Please check whether you have received my email. Best...