How to update b112 to b209 (Android 6.0)

1 . boot into bootloader (Power+VOL down, USB Cable connected)

2. install B112 via ADB

fastboot flash system system.img
fastboot flash cust cust.img
fastboot flash boot boot.img
fastboot flash userdata userdata.img
fastboot flash recovery recovery.img
fastboot reboot

3. do system update with dload B112 Stock on ext. SDcard (not complete)

4. reboot

5. Factory reset (not complete)

6. update B112 to B209 via dload (Put update.zip in dload on ext. SDcard) (complete 100%)
http://ift.tt/1SmeA2V

7. boot into bootloader (Power+VOL down, USB Cable connected)

8. flash TWRP Android 6.0 via ADB
fastboot flash recovery TWRP-ENG-6.0.img
fastboot reboot

9. boot into recovery (Power+VOL down+VOL up)

10. flash KangVIP B209 via TWRP 6.0

PS. My X2 is 702L

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