Why is 4G not working on my Samsung Galaxy S6?

4G isn't working, I have to change to 2G. When using Data and turning of the WiFi the device gets extremely hot, it's like about to explode. I used cooler app it is not helping, nothing seems to work. I can't remove the battery it's not removable.

Hi. Check your carrier's coverage map to ensure that your area has 4G coverage. With regards to phone heating up, what were you doing when the phone heats up? Keep in mind that playing games and watching videos heats up the phone fast.

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