[Huawei P20 Lite Questions & Answers] deepak0055:
Enabling Volte in p20 lite (Nova3e). (Successful done) jio working perfectly

Use this method to unlock the bootloader

1. Use the second method - DC unlocker. I think the huawei website is not giving away any codes from now onwards. Failed I tried it one time.

https://xdaforums.com/huawei-p20-lite/how-to/unlock-methods-to-unlobootloader-t3794725

2. Before trying the DC unlocker please make sure you have installed hisuite and all the drivers of huawei

3. After installating the DC unlocker(dc-unlocker2client_1.00.1403) in your PC. As explained in the post by wisper please make sure you are changing it to manufacture mode.

4. Enable oem unlocking and usb debugging before using the dc unlocker

5. After doing all the above please proceed to get the unlock code from DC unlocker code. If everything is right it will detect our mobile make sure you are installing the latest version of dc unlocker (dc-unlocker2client_1.00.1403 )

select huawei modem from the list and click on autodetect

it will detect and show hisilicon processor or something

Next you have to buy the credit from the DC unlocker website you have to spend 4 eur.

They give you password and username which you have to create.

You have to put this user name and password and click on login in

Then click on unlocking tab in the DC unlocker software

Click on read bootloader code and it will give you the unlock code which you have to save and keep it with you.

Unlocking the boot loader using this code

Please use this video for the unlocking of boot loader - https://www.youtube.com/watch?v=EvCgLoYyasA

Follow the steps in the video once he got boot unlocker code. You will have the adb and fast boot in the DC unlocker rar file itself. No need to download separately.

Check your serial number is showing once you use the fast boot devices command which is shown in the video. It confirms you are in the right track. During boot unlocking you will get prompt to allow boot unlocking select the option using volume control and power button.

Note : I faced some difficulty in going to the fast boot mode. You have to go to fast boot mode before doing the commands. For going to fast boot mode please turn off the mobile and remove the usb connection from mobile. Then reconnect the usb again and immediately hold volume down and power button together it will go the fast boot mode it will show frb unlock and locked something in that window.

Once boot loader is unlocked. Your mobile will reboot to normal mode.

The mobile will reboot after and it will show phone is untrusted blah blah,

Next go for the rooting . All this I have done without any backup. Thats was the riskest part in this.

Please use this link for rooting which I have done successfully - https://www.getdroidtips.com/root-huawei-p20-lite/

Again go to the fast boot mode follow the same steps I mention above.

And perform the same steps in the website.

After these the mobile reboot again and go into the normal mode.

Next install Magisk manager - https://xdaforums.com/apps/magisk/official-magisk-v7-universal-systemless-t3473445

After installing it and download magisk app using the manager from the download option. And proceed with the installation it will show magisk patch found blah blah during the installation.

And you will get notification to reboot and your mobile is now rooted.

Now to enable VOlte

Install ES explorer and then go to root explorer in it. You will get prompt to allow root access since you have rooted your mobile.

And please use this video link to enable volte -

https://www.youtube.com/watch?v=aUfmiDBPczw

Credit goes to truthteller

STEP:

1)UNCLOCK THE BOOTLOADER AND ENABLE OEM UNLOCK

2))ROOT YOUR MOBILE USING SUPER USER OR MAGISK.IF U GOING ROOT THROUGH MAGISK INSTALL ES FILE EXPLORER AND ROOT CHECKER BEFORE ROOT.IF U ROOT THROUGH MAGISK YOU WON T LOOSE AI.BUT WIFI HAS SOME ISSUES.

3)AFTER ROOTING ENABLE PERMISSION IN ROOT EXPLORER.

4)GO TO DEVICE,SELECT SYSTEM,IN SYSTEM SELECT VENDOR,IN VENDOR SELECT BUILD.PROP.

IN BULID.PROP YOU FIND THE LINE COMMAND ro.config.hw_volte_on=true[/SIZE][/B].

ADD THIS COMMAND LINE ro.config.hw_volte_dyn=false

BELOW ro.config.hw_volte_on=true line.

And save it and reboot your mobile. Then you can find the Volte call enable tab in the network setting.

Finally it is done !!!!

I had tested this in my huawei nova 3e successfully and now using jio sim. But I have did this without any backup it was such a risk. Dont forget to turn off automatic updates and I dont want to go through this thing again:D:D:D:D