bootloop problem!!! - Samsung Galaxy S7 Questions and Answers

hello guys, my s7 g930u face this problem! pls help me!
when my phone out of battery or after ota update, it's stuck at samsung logo, can't do anything!
after factory reset it's boot up normally, but it's too annoyance, lost all of data
anyway to fix it?
p/s: sr for my bad english

Try re-flashing the firmware

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