here is how to convert x427 to x426
1. flash the phone to the files attached using ufs
2. after you done flashing the phone with this 3 special files you need to reset MMi, and unlock.
3. do the hardware modification
here is the pictures:
becareful in removing the shield of the antenna switch because their are small parts inside.
You have now phone working in 900Mhz/1800Mhz frequency....
I've tried this solution today....
Good luck...
flash files to follow, i have a problem in attaching files now.