How to change the network selection mode on my Apple iPhone 6s

Click each step to see the action. You can also click the picture or use the arrow keys.

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You can select which network mode your Apple iPhone 6s can use. Changing these settings will influence the data speeds it can achieve.
1. Touch Settings.
2. Touch Carrier.
3. Touch Enable LTE to change the setting (e.g., from off to on).
4. The network selection mode has changed.