Use as always at your own risk!Sorry my English is poor
It is the location of China but it is not a problem change runs the hw/eu location
What do we need?
1. ROM B354 china location
https://mega.nz/#!skIijDrL!Vdob3r9-pYaYAl45grFIR-8o8b-QxG5hUra53VnM-0M
2. Zip file oeminfo
https://mega.nz/#!Vg4k1RYD!cazOgz2Okoyfr9B0orqOlglPv9bDnJhJOmwOlhQxNwc
3. Adroid 6.0 ROM update B510
https://mega.nz/#!E94wnYqA!iCwYpU4xnBcpM9KQzntjuYqgTznjm07e-etyLPACHBo
4. Root Explorer on your phone
5. Root privileges
6. Installed on the phone stock rom 5.1.1
7. Installed on the phone root explorer or example ES file manager
Let's go
1. Now unpack file you downloaded oeminfo.rar to PC C:\
2. Opening root*explorer in phone dev/block/platform/hi_mci.0/by-name and copy file oeminfo to the SD card
3. Connect your phone to PC and copy file oeminfo to PC C:\OEMINFO\
4. Rename file in PC oeminfo oeminfo.img Now run oeminfo.exe and change location cmccchannel/cn and apply
5. Oeminfo.img change back to oeminfo and copy to phone SD
6. Disconnect phone. Opening root explorer . Copy files oeminfo from SD back to dev/block/platform/hi_mci.0/by-name
7. Opening root explorer and open file in text editor custom.bin in \DATA and change to cmccchannel/cn and save
8. Opening root explorer and open file in text editor build.prop in \SYSTEM and change line ro.build.display.id= ............ to
line ro.build.display.id=Z100-TL00V100R001C01B113 and save.
9. Reboot phone
10.Now Unroot android and change to stock recovery
11. Unpack file MT7-TL00-TL10_EMUI3.1_Android5.1_B354.zip and copy update.app to SD card Folder Dload
12. Install from local update
13. Copy Rom B510 file update.zip no unpack to SD card Folder Dload
14. Instal Update
BOOOM
Tested on my MT7-L09 ROM B324 loacation HW/EU
I hope this helps
If you want to use another rom B354 I not tell my later
Everything can be undone only you need your Rom 5.1.1 and their old location
RollBack 510 to 354 is here https://mega.nz/#!dxIRkaaB!FPo8QoEKU78s80KCFRs3d2Wz2HBa-WvyU6FKFSY474E
TWRP 100%for B510
https://mega.nz/#!M0JEnKSI!36H104lRZUEb_PLPuVeRLk53Nwm8tdQEjf1hEK3t57U
SuperSUpro
https://mega.nz/#!lsIGCDRa!qPDHIp3JyM1zQjWcD4NXlbqeDHGr4DWFGpO8No0-OR0
Before installing SuperSU back up all the TWRP
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