Network Mode Settings - Moto Z Droid Edition / Force
From a Home screen, navigate: Apps icon > Settings > Network & Internet > Mobile Network.
Tap Preferred network type.
Tap the appropriate setting:
When LTE/GSM/UMTS is selected, if presented:
Tap one of the following options:
When selecting Manual, tap the preferred network.
The preferred global carrier is automatically selected. You can manually select an alternate carrier but it may require as many as six registration attempts with that carrier prior to successful registration.