Hi, What is the model number of your range extender? Besides, it is suggested to troubleshoot and narrow down the root cause as below instruction: https://www.tp-link.com/en/support/faq/2233/...

Hi, Thanks for your feedback. Cause it works with the firewall disabled, it had been blocked by it before. While considering you want to enable the firewall, it is suggested to contact the tech...

Hi, Glad to hear that the phone works. While what do you mean by the signal is continuous TUUUUUUUUUUUUUU and not alternating TU---TU---TU---TU? Does the signal means the wireless signal or it is...

Hi, What is the operation mode of the main AP? Is it the router mode or the access point mode? What do you mean by 2nd level node? Meanwhile, how do they connect each other? Via wireless or wired...

Hi kkumul, Thanks for your feedback. Cause now it is gone, please take some time to test whether it pops up again. If still there, please hard reset this unit and re-add it into the existing network...

Hi, You do not have to go to quick setup to create the profile manually, instead, go to network-LTE dial-up and click create to do that. Meanwhile, below is the download link of the official firmware...