Type *#0011# in dailer Menu to Open Service Menu. In Service Menu, tap the Soft Menu key, the Left Soft key and Select Back. Now Tap Menu Button again and select Key Input from Options, Tap on the Pop-up, Write 1 and press OK. Tap Menu Button again and select Back, now you are in Main Men of Service Mode. Now Select UMTS from the Menu. Once in UMTS Menu, Tap  Debug Screen. In Debug Screen, Tap  Phone Control. In Phone Control Menu, Tap  Network Lock. In Network Lock Screen, Tap  PERSO SHA256 OFF. Tap Menu Button and Select Back again. You will Return back to UMTS Menu. Now Select,  NV REBUILD. Tap on  Restore Back-up Now Tap On  Common. Now Your Phone will Freeze for a Moment or Two, then the Screen will Turn Off and your device will Reboot. Now Put any Other Network SIM to check whether your SIM Lock has been removed or not. Try this! Working with most Qualcomm phones!
In base rom only have two language! Multilang not included! This is not my own rom! I ported only hardware drivers from Blade V! This system is not similar to Touchwiz!!! This is private developed system (AOSP) to MI smartphone dervices! [ MIUI CHINESE ] Please read Czech MIUI forum! http://www.miui.cz/
Where from flash the zip? Internal or External SD? Down the rom again or re-put the zip in your SD Card! Yes first flash the STABLE rom and flash gapps or download google playstore etc.. than you can update to latest rom! :) What is the error message?