Already replied to you https://community.tp-link.com/en/home/forum/topic/159297?replyId=329626

Hi, The 2.4GHz was in orange and 5GHz in blue won't affect the performance, it is to verify them by putting them in different colors. Back to your case, that is a little weird, it is suggested to...

Hi, Is the model Archer VR2800? What is the light status of it when the DNS error message pops up? Can you login to the web interface of the VR2800 at that time? If so, please take a full screenshot...

Hi, What is the model and OS of your cellphone? Please login the web interface of MIFI and check SMS to figure out the items of message and whether these messages contain any special charcters; Or...

Hi, Please follow the instruction below to pair them manually. https://www.tp-link.com/support/faq/258/ Note: The power led should be flashing after you hold the pair button for 1s. Then if it still...

Thanks for your reply; that is a little weird, you can try to hard reset the D20 manually and reconfigure it manually, do not restore the configuration files to give it a go. Or cause the current...