@cloud29 Hello, you can find the serial number on the back of the actual device. It is S/N. Besides, may I know when and where did you buy this MR200? Good day.

@Mik_Ian_Castle I see, thanks for your reply. If you still want to do further analysis to locate this issue, you can send the screenshots of the parental control settings on Archer MR200. Otherwise,...

@AfzRoy Hello, has replied to you on another thread. https://community.tp-link.com/en/home/forum/topic/111230?replyId=394182

@Cephesus Hello Björn, may I know who is your Internet service provider? And where are you located? Does the upload speed affect the actual performance of the Archer MR400? And what is the current...

@Mik_Ian_Castle Thanks for your valued reply, glad to hear that you figured it out. It seems that the local official website does not upload the firmware, that is why I attached the download link of...

@pMR600 Hello, cause it works well during the day time; you can contact the ISP to verify whether there is any maintainence activity or internet drop-out at their end in the morning. Meanwhile, as I...