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After installation of jio app in my htc desire 828 phone is getting heat near the ear speaker while using mobile data and while talking more than 15 min. But i didnt use the jio sim. Just installed the app only and unistalled on that day only. And one more thing phone is showing cpu temp almost 40-45 celcius in cpu cooler master and clean master.what is the reason for the overheating . Plz help me what to do? I have given my phone to the service centre for 2 times but the problem is not solved.

My phone jio phone is dropping in water