[Xiaomi Redmi Note 3 Guides, News, & Discussion] iamgauravmishra.sj:
Hello guys,

I'm requesting you share it more to help others.

Don't blame me or other members if anything gets wrong with you or your device. Thanks

Things you need:::

Important

Unlocked Bootloader officially.

1.

MIUI fastboot ROM this http://bigota.d.miui.com/6.11.3/ken...1103.0000.00_6.0_global_f7309f8161.tgz (comes in *.tgz or *.tar not in .zip)

2.

Xiaomi Mi Flash tool-BETA version.

3.

ZCX TWRP.

4.

CM14 CM14-firmware_20161115.zip from here https://www.androidfilehost.com/?fid=385035244224398629

5.

NitrogenOS(based on Android_7.1) http://xyyx-dev.ru/nitrogen-os/testing/nougat_7.1/kenzo/Nitrogen-OS-kenzo-20170106.zip

(Goodfix fingerprint sensor only flash this for fpc http://xyyx-dev.ru/nitrogen-os/testing/nougat_7.1/kenzo/fpc_fix.zip

6.

Any open Gapps package for android 7.1 on your requirement. I'm using mini version.

7.

voLTE patch from here https://www.androidfilehost.com/?fid=817550096634741250

nothing else :o

Q.Why fastboot ROM?

A.because it formats all the partitions also your internal storage (Take a backup 1st :) )and re-partitions all files on correct address. And this ROM uses the firmware that is mostly used on custom ROMs as I guess. I don't know I'm correct but that is what I think.

Q.Why NitrogenOS?

A.comes with less camera bug. Overall performance is good, can run substratum theme engine.

Q.Why voLTE patch?

A.it works on all voLTE or non-voLTE declared cm14.1 ROM. May be you will find your voLTE working without flashing it.

Q.Why ZCX recovery?

A.it backups all partition and have all the features of other RN3 supported recoveries(cofface,alka,official etc.)

Q.why cm14_15112016_firmware?

A.since it may lock your bootloader again but works great give a thanks to the developer of it.It is must to use this firmware for any force stop issue.

Q.Why RADON KERNEL

A.comes with stability and improves battery and performance get it here https://xdaforums.com/redmi-note-3/development/kernel-t3414884

Follow these steps carefully and have patience!

Step 1

Flash the MIUI fastboot ROM v6.11.3through PC by using MiFlashTool using clean all option.

Step 2

after flashing, It takes too much time to setup your MIUI. recommended to use internet.

Step 3

now you find voLTE icon on this MIUI ROM.

Step 4

reboot to bootloader and check whether your bootloader is locked again or not. If locked, unlock again using official method.

Step 5

flash ZCX TWRP.

Step 6

reboot to ZCX. And take a backup of only these partition efs, firmware on your internel or in PenDrive(recommended).

Step 7

Make a folder like this "MIUI 6 efs" on PC and Copy the TWRP(/TWRP/backups/...) backup folder in PC from PD.

Step 8

Now copy these tools in PD CM14 firmware15112016, NitrogenOS, gapps, VoLTE_v2N_13-1-17.zip in PD and connect to RN3.

Step 9

Format system,data,Dalvik/ART cache,cache.

Step 10

choose install and flash the CM14_151112016_firmaware. It may lock your bootloader again. To check, reboot to bootloader from recovery and check by using fastboot oem device-info command on PC. If locked unlock again through official method.

Step 11

Now reboot to ZCX from fastboot. By pressing volume up button 1st and then power button when get a vibrate feedback leave power button(not volume up) untill the recovery window get shown.

Step 12

Now install NitrogenOS, install fpc_fix.zip(if you are using fpc fingerprint sensor,mine is fpc sensor so i flash it everytime), install Gapps and then restore the EFS backup you have taken(on MIUI6.11. blah blah).

Step 13

reboot to system and setup

If you find HD icon on status bar then good use it now or reboot to recovery and install

VoLTE_v2N_13-1-17.zip. now reboot you will definitely get that. If not then restore again the EFS partition.

You will surely get. If everything get done take a full backup of this ROM for future this ROM's EFS partition gonna work for you in future.

I'm SURE you will be stuck on this ROM

Everything is here latest android, Vulkan API, better battery backup and voice over LTE

Final

If it helps then thanks me and specially thanks to Sudeep Duhoon(https://xdaforums.com/member.php?u=4913907) for voLTE patch.

--to XIAOMI for giving the permission to you for unlocking youe bootloader.

--to all others.

--All credits goes to those who provide these fixes and tools

The voLTE patch will also work on non-voLTE android 7.1 ROMs.