@Hum55555 

Hi,

May I know the certain issue you met?

Case 1: Not seeing the default Wi-Fi network (TP-Link_Extender_XXXX) of the extender on your phone.
    a. Make sure the Extender is in factory default state, press the RESET button (hole) with a pin for 1 second (the light on the extender would flash) to reset the range extender back to factory default.
    b. Put your phone next to the Extender.

Case 2: Cannot find the host Router's Wi-Fi network on the Extender.
    a. Put the Range Extender close to the host Router.
    b. Make sure the Wi-Fi network of the host Router is not hidden, if the host Router's wireless network is configured to be hidden, you may also manually input the Wi-Fi SSID/password for the Extender.
    c. Change the Wi-Fi channel of the host Router, we recommend using channel 1/6/11 for 2.4GHz and 36/40/44/48 for 5GHz. Avoid using DFS channels on the host Router.
    d. Reboot both the host Router and the Extender, try agian.

If all the advise above cannot help, please contact the local support team with the results with the troubleshooting steps.If all the advise above cannot help, please contact the local support team with the results with the troubleshooting steps.