@tnf02 Hi, carrier aggregation doesn't limit to work with TDD or TDD+FDD LTE bands only, the supported band combinations are decided by both the router and also the base station. To check carrier...

@loki-11 Hi, you mentioned that the 4G WAN IP displayed on the MR6400 starts with 10. which is a private IP address, it means there is another NAT in front of the MR6400, if you are using SIM card...

@amitkray31 Thanks a lot for sharing the logs, for 5G Jio SIM issue, please refer to: https://community.tp-link.com/en/home/forum/topic/604130

@Andrew27 Hi, I've sent you a private message, please check if it works

@Deimos Hi, did you test the extender speed via WiFi of via wired connection? please connect one wired device to the extender to test internet speed again, if it is still much slower than the source...

@Namaqwa Hi, you mentioned that the extender has cloned the wireless settings from your router, could you please try to change the WiFi name of the extender to be different from your router, then...