Wifi issues with mobile

[HS7]

I have checked broadband connections and speed? It is saying 75Mb/s. And it is reading connected. My sky box is ok, but having really big issues with WiFi on my mobile? I use my mobile at home mostly and can only get signal with WiFi turned off ,using mobile WiFi which will cost? I have never had trouble before,  but it is really bad. What is the problem please??

[caesarome]

There is no cost to using Wi-Finin your property when it is connected to your broadband hub but depending on your data package with your mobile network

there might be a charge using this if you are on pay as you go with your network.

What is happening when your mobile is connected to your Wi-Fi ?

[HS7]

Thank you,

The issue is that I'm not able to use my Internet with my own broadband/WiFi. 

It will only work if I turn the WiFi off on the mobile,  hence using other data ,which will cost? Sorry if I didn't explain it very well. 

I am with O2 and they are saying there is no connection? Sky broadband are telling me, there is full connection? All I know is that my mobile Internet connection is showing  its OK, but it's not???