Install MiUi v6 Developer Rom on Mi3 REQUIREMENTS : Download Miui v6 Devloper Rom (WCDMA/CDMA China) How To Install Miui 6 Developer Rom On Xiaomi Mi3 (MiUi v5) : Download developer MiUi v6 rom from above. Paste it to your devices internal storage. Now open updater app by going to Setting/ About Phone / System Updates Press System Updates and then press menu key and select "Select Update Package" Now select the update package from your internal storage. It will start installing and then automatically reboots. Now enjoy MiUi v6. download file now