My iPhone 6 has been shutting off by itself?

I have only recently bought my iPhone 6 about 1 month ago and only dropped it twice and the drops weren't too high or too rough. But at night when I go to sleep I charge it right next to me and i make it is charging but when I wake up it completely shuts down and it does not turn on unless the do the reset method which is to hold both the home and lock button. This has happened only 2 times. Is this normal or what is the problem? Should it

The problem is the phone's quality. Contact Apple customer care to fix the problem

Man, you are the most careful person I ever came to know of.

Congratulations for having dropped the iPhone only "twice".

There are idiots (like me) who have never dropped it, even once, in the entire time they owned the iPhone.

After dropping it just " twice ", did you think of taking it to the Store to have them take a look at it?
If you did not take it to the Apple Store, to have them look at the iPhone that was "dropped only twice". Why?

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