res/xml/smart_forwarding_mdn_handler_header.xml

<PreferenceScreen
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:key="network_and_internet_screen"
    android:title="@string/smart_forwarding_input_mdn_title">

    <EditTextPreference
            android:key="slot0_phone_number"
            android:title="SIM 1"
            android:dialogTitle="@string/smart_forwarding_input_mdn_dialog_title"
            android:persistent="false" />

    <EditTextPreference
            android:key="slot1_phone_number"
            android:title="SIM 2"
            android:dialogTitle="@string/smart_forwarding_input_mdn_dialog_title"
            android:persistent="false" />

</PreferenceScreen>