@grey209 Hi，thank you very much for the feedback. 1. Do you mean there are 50 client devices connected to MR400 at the same time? are they connected via wired connection or wireless connection? and...

@yynnoott781 Hi, thank you very much for the feedback. Were there still any client devices connected to it at night? if necessary, you could turn off mobile data on Advanced->Network->Internet page.

@xxThorx Hi, thank you very much for the reply. It seems that your phone is working on 4G band 20, and MR6500v supports band 20 as well, but it shows No Service. Please make sure the two external LTE...

@lz120 Hi, You will need to change the operation mode to wireless router mode first, here is the detailed instruction: https://www.tp-link.com/en/support/faq/2719/

@arjzzzz @Cris24 Hi, I've sent you a private message about the firmware recovery, please test if it helps, thank you!

@Jababamba Hi, I've sent you a private message, please have a check. Hope it helps!