why is my new samsung galaxy s7 freezing

[AC Question]

I bought the phone 1 day ago. on setting it up it felt rather hot, but then cooled down. assumed it was heat from processing a lot of info to set up.

After this i inserted a microsd card and all was fine. The following day i was taking pics and it said they couldnt be saved to the microsd. Approx half an hour later the phone froze. I held the volume down key and the power key and rebooted it. Phone was fine for approximately 4 hours and then it froze again. Why is this happening ?

 

[belodion]

First, try it without the card. Tell us what happens.