A very unusual problem

Hello all. I just registered to this forum in hope to solve my problem with your guys helps. I tried many things and many forums to fix my phone's problem but no avail. I'm sure people did their best to help me and I would really appreciate if you could your best too.

I have the Galaxy S5. I was very content with it, minor issues most of the time.
Until I update it to the latest firmware (for solving call issues).
I don't know what just happened but my phone is suddenly turned to be very...

A very unusual problem

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