Usually, LTE is enabled by default on devices. Sometimes it can be turned off when travelling internationally, troubleshooting or even simply accidentally changing the setting.
How to enable LTE on an Apple device
To enable LTE on an iPhone or an iPad running iOS 10.3 and later:
How to enable LTE on an Android device
On Android, the settings vary slightly from one model to another and from one Android operating system to another. Below you will find the most common settings found to enable LTE.
Alternatively or if none of these options apply to you, visit the