Network Mode Settings - DROID RAZR M by MOTOROLA / Luge™ by Motorola
From a Home screen, tap Apps.
From the APPS tab, tap Settings.
From the WIRELESS & NETWORKS section, tap More.
Tap Mobile networks.
Tap Preferred network type.
Select the appropriate setting:
If GSM/UMTS is selected, tap Network operators.
Tap the appropriate setting:
This is the preferred setting for most locations.
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.