Thanks for the Best Answer
LTE means Long-Term Evolution and is the term used for 4G virtually everywhere except within the EU. Most manufacturers list it as LTE/4G - for some reason Samsung don't.
Did you try
From the homescreen, tap and hold the notification bar at the top and slide your finger down.
Swipe your finger to the left to reveal more options.
Tap and hold Mobile data.
Tap Network mode.
If you want to use 4G, make sure LTE/WCDMA/GSM is enabled.