QMobile QTab Q400 MT6582 Stock Firmware

Inital Boot Ok!
BB_CPU_PID : 6582
BB_CPU_NME : [MediaTek] MT6582_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 : 0x87
NAND Flash : NOT INSTALLED
eMMC Flash : 15010038574D42335201C157C0E751BF
Initialize Memory ... 
DRAM already initialized by Preloader
eMMC FlashIC initialized
[eMMC] : FLASH_VEN : 0x15 , OEM : 0100
[eMMC] : FLASH_INF : [SAMSUNG] , R3BMW
[eMMC] : FLASH_CID : 15010038574D42335201C157C0E751BF
[eMMC] : FLASH_BRT : 0x00400000 , 0x00400000 , 0x00080000
[eMMC] : FLASH_LEN : 0x00000001D2000000
[eMMC] : FLASH_UCP : 7456 MiB [eMMC 8 GiB]
DEV RID    : 9FC19A018BF58A1DDDBDADC374EE17A5
INT RAM    : 0x00020000
EXT RAM    : 0x40000000
BOOT TYPE  : EMMC_FLASH_BOOT
SOC VERIFY : C1
Boot Ok!

Reading Flash Content now ... 

Brand     : QTab
ProdName  : reallytek82_tb_jb5
ProdModel : QTab Q400
Device    : reallytek82_tb_jb5
AndroidVer: 4.2.2
MTKxCPU   : MT6582
MTKxPRJ   : SW07_QTab_Q400_7_2014_07_18
[Read Ok] : preloader_reallytek82_tb_jb5.bin
[Read Ok] : MBR
[Read Ok] : EBR1
[Read Ok] : lk.bin
[Read Ok] : boot.img
[Read Ok] : recovery.img
[Read Ok] : secro.img
[Read Ok] : logo.bin
[Read Ok] : EBR2
[Read Ok] : system.img
[Make Ok] : cache.img
[Make Ok] : userdata.img
[ScatCFG] : MT6582 / V1.1.1 / reallytek82_tb_jb5 / EMMC
Android Info saved
HWConfig Info saved
FW Size : 1336 MiB
Scatter saved to :

MT6582_Q400_reallytek82_tb_jb5_4.2.2_SW07_QTab_Q400_7_2014_07_18

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 MT6582_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