My iPhoneSE, iOS 12.01, when in-house, shows a signal for my Talkmobile network and another signal for my home TalkTalk network. How do I ensure that only my home network is used when in-house? Hoping this can be done without switching off and on to the mobile network when I go outside.
In short, your phone will use wi-fi for data when it can, 4G or 3G via your mobile contract when it can't. It will always use your mobile contract for voice calls and texts unless your phone and your network support wi-fi dialling.