Most of meizu product ships with locked bootloader, there is no easy way to unbrick the phone safely.
UFI Android ToolBox comes with the solutions for all MediaTek secured chipset.
You will be able to safely debrick, repair imei and even clear locks(pattern, code, PIN, fingerprint) or remove accounts (including flyme account too) with this method.
http://www.youtube.com/watch?v=twgynLFAczc