The network options available are viewable only and consist of: CDMA (1x/3G) and 4G LTE. The device automatically selects the optimum network based on location; the settings cannot be manually changed.
From a Home screen, navigate: Settings > More.
Swipe left or right to access apps; steps apply to the default Home mode.
Tap Mobile networks.
Tap Network type and strength to check the current network type and the signal strength.