If you are using android there is a app called "carrier services" it will not be in the app drawer go to settings > apps uninstall the updates and clear the app data. It worked for me, I wasn't able to make phone calls to landline numbers
If you are using android there is a app called "carrier services" it will not be in the app drawer go to settings > apps uninstall the updates and clear the app data. It worked for me, I wasn't able to make phone calls to landline numbers
