Network Mode - Samsung SCH-S960L Galaxy S III User Manual

Mobile networks
Before you use applications such as Google Maps and find your
location or search for places of interest, you must enable the Mobile
networks options.
From the Home screen, press
More settings
The following options display:
Use mobile data
Allows you to activate mobile data usage on your device.
From the Home screen, press
More settings

Network mode

You can configure your device to either manually detect and use
either a LTE or 3G data network connection.
From the Home screen, press
More settings
361
Mobile networks.
Mobile networks
Mobile networks
and then tap Settings
and then tap Settings
Mobile data.
and then tap Settings
Network mode.