@EwanM Hi, Please confirm if LED lights status on the powerline units are always the same or not especially when the issue happens. You mean internet still works but the speed drops to kbps every 30...

@William46 Hi, you have three TL-PA8010P units in total, right? You mentioned that there is two lights on the dropped unit, please confirm if they are power and Ethernet LEDs, if so, the powerline...

@Zuzaaaaa Hi, the issue happens when trying to connect the TP-Link WiFi network, or logging in the device management interface? Please try resetting the extender to factory defaults by holding reset...

@Gustavo-R Hi, I've seen you another post and replied just now, please refer to this reply: https://community.tp-link.com/en/home/forum/topic/653934?replyId=1316138

@Gustavo-R Hi, EC225-G5 is a model for ISPs only, and we community don't have its information. Regarding the issues you mentioned, some common troubleshooting suggestions are as below, however, if it...

@Osmosphere Thank you very much for the feedback, and if the 4G band still changes, you could also try manually selecting the 4G band: How to select 4G band manually on the web interface of LTE...