Select network on your Apple iPhone 6s Plus iOS 12.0 You can set your phone to select a network automatically or you can select a network manually. If you Before you start · Select Settings · Select Cellular · Set Data Roaming to ON or OFF · To change network if network problems occur, select Settings · Select Carrier.Manual network selection on iPhone 6s Plus. 1/9. In Switzerland your Apple iPhone 6s Plus automatically chooses the Sunrise network. Touch Settings. 1. ; Touch Cellular. 2. ; Touch Cellular Network. 3. ; Touch the slider to turn off automatic network selection. 4. ; Wait while the iPhone searches Tap Carrier. Choose one of the following options: Select network manually, go to 2a. Select network automatically, go to 2b. If automatic network selection is