Got this phone 2 days back, and it has heating issue... went to service center but disappointed... called to Customer care, they said to visit service center...
Bro any device which is used for the 1st few days heats up. The phone is doing many optimisations and sync in the background. I forgot where, but its also given as a warning.
Its a mid-range phone and there are many factors that would lead to heating during first few days like syncing, 5G, app optimisation and charging voltage too. But it settles after 2-3 days on all phones i have bought since 2010. Its normal. If not, get the device replaced within 7 days replacement guarantee.
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