iPhone XR overheating
My iPhone XR overheats while browsing (sometimes, I'm not able to identify patterns) and watching YouTube/Twitch via 3/4G. Signal is stable - 3-4 divisions in most cases.
I do not have such a problem via Wi-Fi.
My phone heats in bottom part (both sides). Display becomes especially hot, back side and frames - less.
I noticed this problem about a month ago (maybe a little bit earlier). I didn't have any problems during november - january for sure.
Unfortunatelly, I don't have any backup for some reasons. So i can't restorе device to factory settings. Also i can't roll back to the previous iOS version.
My current iOS version is 12.2 (16E227).
What can i do in this situation? Should I go to a service center (located in neighboring country)?
iPhone XR, iOS 12