@MkalaFundikira
The chances are when you are at home your device is connected to a Wifi connection.
More the data settings this should be what you need to do:
Go to sky.com/networksettings (My Account > Mobile > Settings) and sign in with your Sky iD.
Select the mobile number or SIM name you're having trouble with.
Scroll to 'Resend network settings' and select Request settings.
Save the settings when your receive them and reboot your phone.
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