[Q][HELP][GT-I9515]Knox counter reset, is it possible? topic

Hi, I have just bought S4 I9515 and it seems I acted with rooting too fast. Unfortunately my phone has issue with frequent rebooting. I would like to send it to service with warranty but after rooting knox counter switched to 0,1. :(
Is there any way to reset knox counter or eliminate rebooting issue?

Thanks in advance for help.

Sebalos