[Upgrading, Modifying and Unlocking] naboleo:
Guess i dump the entier rom using mrt tools :

Disconnect Mobile...
Re-Put the Mobile Bettery...
Then Connect your Phone to Computer again....
Please Make sure Mobile better has Power...
>>> Searching Mobile Port...
Get Mobile Port is: COM7
>>> Device driver identification:
MediaTek PreLoader USB VCOM (Android)
>>> Mobile Has Connect...
CPU_NAME: MT6735
>>> Reading Mobile Hardware Info...Success
HW_Inf: 8A00 SW_Inf: CA00
>>> Initialization Mobile ...Success
>>> Downloading Boot1 To Mobile Phone...Success
The Flash Hardware Info:Q4Z3MB
>>> Downloading Boot2 To Mobile Phone...Success
=====================Flash Type(eMMC)==============
Flash Size: 0x0000000747C00000 -> 29820M
Flash ID: 0x15010051345A334D
Flash Name: Samsung_Unknow
Flash symbol: Q4Z3MB
>>> Software Auto Switch Hight Speed Has Enable...
>>> Swich Mobile to Hight Speed Re\Wr Port...
Get Mobile Port is: COM10
>>> Reading Mobile Map Data...Success
>>> Extracting valid data from partition data...
>>> Software Auto Switch Hight Speed Has Enable...
>>> Swich Mobile to Hight Speed Re\Wr Port...
Get Mobile Port is: COM10
>>> Device driver identification:
MediaTek DA USB VCOM (Android)
>>> Reading Mobile Map Data...Success
>>> Extracting valid data from partition data...
proinfo add:0x0000080000 size:0x0000300000
nvram add:0x0000380000 size:0x0000500000
protect1 add:0x0000880000 size:0x0000A00000
protect2 add:0x0001280000 size:0x0000A00000
lk add:0x0001C80000 size:0x0000200000
para add:0x0001E80000 size:0x0000080000
boot add:0x0001F00000 size:0x0001000000
recovery add:0x0002F00000 size:0x0001000000
logo add:0x0003F00000 size:0x0001400000
expdb add:0x0005300000 size:0x0000A00000
seccfg add:0x0005D00000 size:0x0000080000
oemkeystore add:0x0005D80000 size:0x0000200000
secro add:0x0005F80000 size:0x0000600000
keystore add:0x0006580000 size:0x0000800000
tee1 add:0x0006D80000 size:0x0000500000
tee2 add:0x0007280000 size:0x0000500000
nvdata add:0x0007780000 size:0x0002000000
metadata add:0x0009780000 size:0x0002080000
system add:0x000B800000 size:0x0060000000
cache add:0x006B800000 size:0x0019000000
custom add:0x0084800000 size:0x0025800000
frp add:0x00AA000000 size:0x0000800000
userdata add:0x00AA800000 size:0x069C380000
flashinfo add:0x0746B80000 size:0x0001000000
>>>>ReadBack EMMC Preloader File...
checking Preloader data system....!!!
Backup Mobile Block: proinfo...
Backup Mobile Block: nvram...
Backup Mobile Block: protect1...
Backup Mobile Block: protect2...
Backup Mobile Block: lk...
Backup Mobile Block: para...
Backup Mobile Block: boot...
Backup Mobile Block: recovery...
Backup Mobile Block: logo...
Backup Mobile Block: expdb...
Backup Mobile Block: seccfg...
Backup Mobile Block: oemkeystore...
Backup Mobile Block: secro...
Backup Mobile Block: keystore...
Backup Mobile Block: tee1...
Backup Mobile Block: tee2...
Backup Mobile Block: nvdata...
Backup Mobile Block: metadata...
Backup Mobile Block: system...
Backup Mobile Block: cache...
Backup Mobile Block: custom...
Backup Mobile Block: frp...
Backup Mobile Block: userdata...
Backup Mobile Block: flashinfo...
>>>>verification Flash File Form Mobile Phone: proinfo
FileSize: 0x00300000
Effective data Size: 0x00300000
>>>>verification Flash File Form Mobile Phone: nvram
FileSize: 0x00500000
Effective data Size: 0x00500000
>>>>verification Flash File Form Mobile Phone: protect1
FileSize: 0x00A00000
Effective data Size: 0x00A00000
>>>>verification Flash File Form Mobile Phone: protect2
FileSize: 0x00A00000
Effective data Size: 0x00A00000
>>>>verification Flash File Form Mobile Phone: lk
FileSize: 0x00200000
Effective data Size: 0x00200000
>>>>verification Flash File Form Mobile Phone: para
FileSize: 0x00080000
Effective data Size: 0x00080000
>>>>verification Flash File Form Mobile Phone: boot
FileSize: 0x01000000
Effective data Size: 0x01000000
>>>>verification Flash File Form Mobile Phone: recovery
FileSize: 0x01000000
Effective data Size: 0x01000000
>>>>verification Flash File Form Mobile Phone: logo
FileSize: 0x01400000
Effective data Size: 0x01400000
>>>>verification Flash File Form Mobile Phone: expdb
FileSize: 0x00A00000
Effective data Size: 0x00A00000
>>>>verification Flash File Form Mobile Phone: seccfg
FileSize: 0x00080000
Effective data Size: 0x00080000
>>>>verification Flash File Form Mobile Phone: oemkeystore
FileSize: 0x00200000
Effective data Size: 0x00200000
>>>>verification Flash File Form Mobile Phone: secro
FileSize: 0x00600000
Effective data Size: 0x00600000
>>>>verification Flash File Form Mobile Phone: keystore
FileSize: 0x00800000
Effective data Size: 0x00800000
>>>>verification Flash File Form Mobile Phone: tee1
FileSize: 0x00500000
Effective data Size: 0x00500000
>>>>verification Flash File Form Mobile Phone: tee2
FileSize: 0x00500000
Effective data Size: 0x00500000
>>>>verification Flash File Form Mobile Phone: nvdata
FileSize: 0x02000000
Effective data Size: 0x02000000
>>>>verification Flash File Form Mobile Phone: metadata
FileSize: 0x02080000
Effective data Size: 0x02080000
>>>>verification Flash File Form Mobile Phone: system
FileSize: 0x60000000
Effective data Size: 0x60000000
>>>>verification Flash File Form Mobile Phone: cache
FileSize: 0x19000000
Effective data Size: 0x19000000
>>>>verification Flash File Form Mobile Phone: custom
FileSize: 0x25800000
Effective data Size: 0x25800000
>>>>verification Flash File Form Mobile Phone: frp
FileSize: 0x00800000
Effective data Size: 0x00800000
>>>>verification Flash File Form Mobile Phone: userdata
FileSize: 0x00000000
Effective data Size: 0x00000000
>>>>verification Flash File Form Mobile Phone: flashinfo
FileSize: 0x01000000
Effective data Size: 0x01000000
Corresponding operation completed!!!

Any idea about custom recovery i could flash ?