TWRP 3.1.0-0 is out now for all currently supported devices.
What's new in 3.1.0-0:
  • vold decrypt on a few select HTC devices, TWRP will now attempt to use the system partition's vold and vdc binaries and libraries to decrypt the data partition (nkk71 and CaptainThrowback)
  • adb backup to stream a backup directly to or from your PC, see documentation here (bigbiff)
  • tweak MTP startup routines (mdmower)
  • support new Android 7.x xattrs for backup and restore to fix loss of data after a restore (Dees_Troy)
  • support POSIX file capabilities backup and restore to fix VoLTE on HTC devices and possibly other issues (Dees_Troy)
  • better indicate to users that internal storage is not backed up (Dees_Troy)
  • improve automatic determination of TW_THEME (mdmower)
  • minimal getcap and setcap support (_that)
  • try mounting both ext4 and f2fs during decrypt (jcadduono and Dees_Troy)
  • shut off backlight with power key (mdmower)
  • timeout during FDE decrypt (Dees_Troy and nkk71)
  • support for FBE decrypt and backing up and restoring FBE policies (Dees_Troy)
  • boot slot support (Dees_Troy)
  • TWRP app install prompt during reboot (Dees_Troy)
  • support for AB OTA zips (Dees_Troy)
  • support new Android 7.x log command (Dees_Troy)
  • update recovery sources to AOSP 7.1 (Dees_Troy)
  • numerous bugfixes and improvements by too many people to mention











HOW TO UNLOCK BOOT LOADER MEIZU M2

DOWNLOAD: recoveryTWRP-3.1.0-1_Meizu_M2.img






Credit: 
Dees-Troy
Wittaya Srinuan @MTK Thai Developer
harry-rom.blogspot.com