From a Home screen, tap Apps (located in the lower right).
These instructions apply to Standard mode only.
Tap More networks.
If unavailable, tap the Menu icon (located at the bottom-left) then tap Switch to list view.
Tap Mobile networks.
Tap Network mode.
Tap the appropriate setting:
This is the preferred setting for most locations and should only be changed if experiencing service issues.
This setting should only be selected if experiencing service issues in locations that offer multiple network types and only LTE/CDMA is needed.
This setting should only be selected if experiencing service issues in locations that offer multiple network types and only GSM/UMTS is needed.
The preferred international carrier is automatically selected.
You can manually select an alternate carrier but it may require as many as 6 registration attempts with that carrier prior to successful registration.