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Which phones support Dual 4G/VoLTE?

How to switch 4G to LTE?

How to change the network mode?

Can I set Only 4G on my phone?

How to set Network mode, like 4G(preferred), on my phone?

Where can I find the available network data on my phone?

How to restrict data network connection of the app?

How to turn off Data Monitor?

How to restrict the apps to use data in the background?

How to set Data package?

How to close the data network?

What are the tips on saving data?

Can I turn off the data network connection of the built-in apps?

Where can I find the data usage details?

How to set the reminder that the data is not sufficient?