@MaB_13 Hi, I can see from the user guide and the default firmware should have QoS, and could you please have a check--see attached picture; Thank you very much.

@vdws Hi, Before using the Deco M9 Plus, did you have the same issue with the previous router, or if connecting the computer, would the speed get very stable? May I know who is your internet service...

@Foppwin Hi, Have you checked the chipset of your wireless adapter, such as the Realtek chipset since there are many feedbacks on the Realtek forum as well? If it is, please go to the Deco app, find...

@Raheel197 Hi, Did all the mobile devices have the same issue or just several of them? If setting up one of the mobile devices to high priority, would that make any difference? I would also forward...

@costaolx Thank you very much and could you please also send the APP log file via Deco Feedback to us so that we could locate the final cause; After that, please also try to log into the web UI via...

@TheSpringmouse If the main router did not belong to any Deco mesh system like Deco X20, X60, M9 plus, the answer is no; Thank you.