@orvano Hello, what is the led status of the TL-WA4220KIT when you lost connection? Can you get internet from the main router at the same time？ Try to change another sockets to plug the powerline...

@AJN Hello, RE200 V3 supports Onemesh already. https://www.tp-link.com/en/onemesh/compatibility/ Please ensure that the firmware is up to date. Good day.

@paula_gl Hello, is it always the third phone the same issue? Please ensure that the firmware of the TL-WA850RE is the latest one. You can customize the wireless settings of the main router to give...

@Emergence Hello, please ensure that the wifi leds on the extender units are on. May I know have you ever cloned the wireless settings of the main router? You can login to the web UI of the...

@Meow_Meow Hello, theoretically, you can connect the RE205 to the EAP225 to boost the wifi signal, while the speed from the RE205 may be affected by the performance of the EAP225. Considering the...

@kivy Hello, the TL-WA855RE is a single band extender, it supports 2.4GHz only. We have some dual band extenders, like RE200, RE450. May it help.