Great news !! Hovatek Guys Are the best !!
Here's the world first CWM that works on BLU STUDIO M HD model, thanks to hovatek guys!
Here's the link for it : https://drive.google.com/open?id=0BwQgcb...EMwNEJyVE0
Here's what i learned that might help people out there!
1) UNlock bootloader blu Studio M Hd 3 simple steps:
A) On your android system, make backup of everything, enable developer options and enable usb debugg + OEm unlock! DONT TURN OFF YOUR PHONE.
B) With your phone turned on please connect it to your computer and open minimal adb and fastboot an please do type ADB REBOOT BOOTLOADER ( This will make your phone to boot up in bootloader mode for fastboot)
C) Now on Fastboot you re going to type : FASTBOOT OEM UNLOCK and then press YES ( if you did everything right till here it will unlock your phone model), if you get some error, please get back to item A and fix developer options oem unlock enable!
D) Now you ll enter into bootloop because of the oem lock, dont worry, just go on with sp flash tools and do " download" the stock image without format and it will be back!
E) Now you re ready to do the same as step A and get back to the Fastboot, please do type Fastboot Getvar All and see if it shows unlocked, you can do the same by typing fastboot getvar unlocked.
F) Now we are ready to flash the amazing CWm that hovatek did for us, you have to choose, flash it with sp flash tools or with fastboot, on fastboot just copy it in the folder and type Fastboot flash recovery recovery.img
Now we are ready!
Im sure you may enter into boot loop, again dont worry, do download the stock again into the phone with sp flash tool but remember, dont erase and dont flash the recovery because the recovery needs to be this one hovatek had provided!
Last step: How to avoid system from erasing custom recovery ???
Answer: Using a root browser
Rename the extension of recovery-from-boot from .p to .bak
Happy Hacking to all blu studio M devices and Thanks alot Enigma from Hovatek team !! Best Wishes!