Boifun 2kuhd doorbell poor WiFi signal

[JDsnake]

So the door bell connects to the WiFi but at stage 2 of testing connection it says that it is a poor connection not suitable for doorbell even in room with router and phone says excellent signal quality. I've connected and split 2.4ghz and 5ghz signals it works on 2.4ghz but days signal to poor to use and it doesn't load video due to buffering/singal strength. Sky turned off broad band shield. Still not able to get usable WiFi signal next to router for doorbell. Phone says excellent WiFi signal. 

[jamesn123]

@JDsnake 

If your phone is working fine, I would argue the problem is the doorbell, not your router.