Particularly 4G network quota, if your data package offers more quotas, there is an easy trick you can do, which makes the smartphone to lock the 4G network only. For that, there are 2 ways you can go. Let's find out the explanation here.
Scroll down the screen, find Set preferred network type. Select LTE only.
2. Using the Application
However, please note, the trick of locking the 4G network only applies to SIM card 1. Therefore, make sure the SIM card operator you use, installed in slot 1. Another weakness is every time the smartphone off or restart, this setting will change as before
Two other things you should also consider is the area around you should have been blanketed 4G network of operators that you use and may not all brands of Android smartphones can do this trick.
So how to lock the 4G network on Android smartphone. Hopefully these tips are useful for you who want fast internet access.