Maybe i wrong post here, not sure where i need to ask

How to check my both phone using same wifi chip/channel/speed
Because on my room, my tablet no issue using wifi, even have half signal
But phone most of time only have 1 bar, sometime showing ! on wifi icon
Mean connected, but can`t use.

Wifi router at living room, my room about 20 feet away, within it have 3 walls
Router TP Link WR841HP
Phone
Samsung A7 2016, Samsung Tab A 2017

Sorry reply 2 week post
Iphone signal bar is mobile signal, you see wrong icon