Now you are wondering how can you install same Cm12.1 Rom in two different devices.For your knowledge This Cm12.1 build cancro supports both Xioami Mi4 and Mi3 as both device has virtually same code in them.So you can install same CyanogenMod Rom in both devices.
gammerson.com is not responsible, if you damage or brick your device.
Do it at your own risk and follow the instructions properly.
#How to install Official Cm12.1 rom in MI 3 and MI 4
Note:Your device must be rooted and must have Custom recovery installed in it like CWM or TWRP.
4.Do backup your Current Rom
before flashing any rom in case you face boot loop,or bricked you device
so you can restore your Mi3 or Mi 4 to previous state.
5. Now tap on Install zip,then select Cm12.1 for Mi 3/Mi4 .zip file and flash it.The flash Gapps for android lollipop 5.1.1.zip
6.Now clear cache and Data and wipe dalvik cache.
7.Done! Now reboot your device
wait for few minutes as it takes a while in first boot after finishing
boot enjoys Cm12.1 on your Mi3/Mi4.