M2 Always rebooting cannot go to home

Hi All,.

I have problem with my device. I new buyer for the meizu m2. Why the M2 stil reboot and reboot for the first time and thats make long time. Sometimes can go to Home sometimes stuck on booting and booting. When i can go to home i see the firmware is try to upgrade to and move the update.zip on recovery mode directory still corrupt. I check the download file the md5sum is same with my PC when i copying to recovery directory the md5 never same.

Please help Me. When i buying until now i never using the phone still rebooting.
Thank you

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