How to enable 4G in Realme c21 c20 c11 all device

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This is my realme c21 android device. In this video, I will show you how to do manual network selection on Realme devices. And how to do only 4g network selection.
Go to the Google Play Store.
Then search by typing 4g mode only.
Then install this 4g only network mode app on your mobile.
Then open the app
Select your SIM card here
Select the network band of your choice from here
Now I will select only 4g network
This way you can select 3g, 4g network on your mobile

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