B Fly Blaza B3 MT6572 Stock Firmware Tested

Inital Boot Ok!
BB_CPU_PID : 6572
BB_CPU_NME : [MediaTek] MT6572_S00
BB_CPU_EXT : 0xCA01 , 0x8A00 , 0x0000
Processing BROM stage
Settings for BROM configured!
SecCfgVal : 0x00000000
BromVer   : 0x00FF
BLVersion : 0x0001
PreLoader : Active [ Boot with PL ]
BootLdrSS : NORMAL with SPRELOADER
Processing DA stage
DA Select done, will use MTK_AllInOne_DA_v5.1552.01.01
Sending and initialize DA ...
Running DA ver.4.2 on BBID : 0x88
NAND Flash : NOT INSTALLED
eMMC Flash : 3701FF454D43303447100900C968917D
Initialize Memory ... 
DRAM already initialized by Preloader
eMMC FlashIC initialized
[eMMC] : FLASH_VEN : 0x37 , OEM : 01FF
[eMMC] : FLASH_INF : [NOT_IN_BASE] , G40CM
[eMMC] : FLASH_CID : 3701FF454D43303447100900C968917D
[eMMC] : FLASH_BRT : 0x00400000 , 0x00400000 , 0x00400000
[eMMC] : FLASH_LEN : 0x00000000E9000000
[eMMC] : FLASH_UCP : 3728 MiB [eMMC 4 GiB]
DEV RID    : B9ACA98990260C62A35A694EFCDD7A83
INT RAM    : 0x00020000
EXT RAM    : 0x20000000
BOOT TYPE  : EMMC_FLASH_BOOT
SOC VERIFY : C1
Boot Ok!

Initial info:
Brand     : M100
ProdName  : BLAZA B3
ProdModel : BLAZA B3
Device    : BLAZA B3
AndroidVer: 4.4.2
MTKxCPU   : MT6572
MTKxPRJ   : ALPS.KK1.MP7.V1
MODEM : 
BaseBand  : MT6572_S00_MOLY_WR8_W1315_MD_WG_MP_V43_1_wg_n
EXTRA : 
LCD [0] : nt35512_dsi_vdo_6572_fwvga
LCD [1] : ili9806_dsi
LCD [2] : ili9806c_dsi
LCD [3] : hx8379c_dsi_vdo #nt35510_dsi_cmd_6572_fwvga
LCD [4] : nt35512_dsi_vdo_6572_fwvga
LCD [5] : ili9806c_dsi
LCD Res : 854x480
TOUCH [0] : ft6336_gesture
TOUCH [1] : GT9XX
CAM [0] : gc0328_yuv
CAM [1] : gc0329_yuv
CAM [2] : gc2155_yuv
CAM [3] : gc2035_yuv
CAM [4] : gc2145mipi_yuv
CAM [5] : ov5645_mipi_yuv
CAM [6] :  sp2529_yuv sp0a19_yuv
MODEM : yuanda72_cwet_kk_hspa_850_2100_switch
Done!

MT6572_M100_BLAZA_B3_4.4.2_ALPS.KK1.MP7.V1

Password: Gsm.Marhaba

Free firmware Without password
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How To Flash:

Its a Scatter file you can flash it with Sp Flash Tool or any Flasher Box 

Select “scatter-Loading” and Slect MT6572_Android_scatter.txt in folder
Wait file to be added into Flash Tool + Any box
Select “Download Only” or if upgrade “Firmware upgrade” in Flash Tool
Turn off your phone
Press “Download” button to start
And connect your phone into the computer via USB data cable.
The process will start and a red progress bar will appear after color purple, yellow.
And green circles display
Finish !
You can now safely disconnect your phone and turn it on.
Full Tutorial Here