yashsingh1/xdaforums huggingface dataset:
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
This could be, because you tried first Root with SuperSU.. before your Display was black :)

Magisk checked that boot.img is already modified by other programs...

It would not be a problem if you would have a TWRP Backup from original boot.img before you tried first time to Root.

We can check if you have maybe already Root.

Do you have the SuperSU zip which you had used first time for Root?

If you Unzipp it on PC - in the folder "common" is the superuser apk.

Install this app on your phone and open it.

Tell me, which message you get.

I found here a Chinese Site:

http://www.huaweishuaj.com/thread-663-1-1.html

So it should work with SuperSU.

You can try latest one from OP:

SuperSU 2.82 SR5
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] sanam tumda:
Da
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] foreman31:
Supersu

I tried all those 2.82 supersu zips but none worked, then seen down the bottom a link to 2.81

It worked!

grr
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
It always depends on device and firmware - for other devices/firmwares 2.82 is working
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] scaniathe:
in Russian yes :)
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] juniorvgf:
Google don't work

Hello again! Finally, I install Magisk and do the root on Huawei Honor 6A. Then I installed via flash the OpenGapps (pico) and it added to my phone the core gms package that was missing. However, by clicking on the Play Store icon, the screen flashes and the application does not open. Strangely, the same thing happened with Opera that is installed. Also, nothing happens when I click to add a Goggle account on the device and also in the Gmail app.

Can you tell me if this could be happening due to active root? Do I need to remove it?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] jurluk:
I still didn't find solution for my problem

These are versions I have used so far

1 SuperSU-v2.82-EMUI5-SELEnforcing.zip

2 SuperSU-v2.82-EMUI5-SELPermissive.zip

4 SuperSU-v2.82-without-additive.zip

5a SuperSUv2.82-EMUI5-dm-verity-Enforcing.zip

5b SuperSUv2.82-EMUI5-dm-verity-Permissive.zip

I have figured out that with permissive version es file explorer has access to system partition, although it is readonly, but root explorer check still fails.

adaway is still not working, with any version.

Now I want to try with 6a and 6b versions.

Since they are labeled "noverity" and currently my data parititon is encrypted, I want to know what will happen to data partition when I flash zip.

Will flashing zip decrypt partition and therefore format it and lose my data or what else will happen?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
No, it hasn't to do with Root.

The Problem is AL10!

Its same on P9.

If trying GmsCore and GApps on AL10 it doesn't work properly or doesn't work at all.

You would need Debranding - but for this you must wait, cause there are no methods at the moment.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Okay I searched for you..

Here's the Thread

https://xdaforums.com/p10/how-to/twrp-how-to-root-p10-lite-t3617418

Do you use TWRP from this Thread?

It works with my previous Version 2.81

- (I changed the numbers in OP since 2.82) this makes mistakes

- you can download this Version and it should hopefully work

https://www.androidfilehost.com/?fid=673368273298957723
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tojgli:
Does this root method work on Oreo EMUI 8.0?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Nope!
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tojgli:
Then which SuperSU should I use?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
1) OREO is EMUI 8 and not Emui 5

2) It is required to tell me which device to you have? Which Build-Number? - cause ROOT is not for every device and Android Version the same!!

3) Each device must use his specific TWRP
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tojgli:
I have a Huawei P10 with B360 firmware. I used this description and it's working perfectly. https://xdaforums.com/honor-8-pro/how-to/guide-how-to-root-h8pro-a8-0-0-emui-8-0-t3699671
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Fine - but sorry, you did not tell me which device you have before - and how could I answer not knowing the most important thing...

There is another possibility too:

https://xdaforums.com/p10-plus/development/magisk-p10-p10plus-t3752482
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tojgli:
Thanks.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] assassin198911:
problems on my huawai p9

-Bootloader is unlocked

-Custom Recovery is installed

-if i klick on install the superSu.zip it tries to install but restart the phone to normal system without any changes...

Has anyone a solution?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Which SuperSU version did you use?

And which TWRP?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] assassin198911:
Thank you for the quick answer.

I´ve used the following versions:

-TWRP 3.1.1-1-eva.img

-Try to install SuperSU:

- V2.82 SELEnforching

- V2.82 without additive

- V2.78

- V2.65
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Last question before I post a solution - with Firmware to you have, which cust, which EVA-xxx?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] assassin198911:
Here the Smartphone data:

EMUI: 5.0.1

Adroid Version 7.0

Build-Nummer: EVA-L09C432B398

Basisbandversion: 21.258.08.00.030
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Do it with following steps:

0) Enable ADB Debugging and USB Debugging in Developer Options (in this order or it will not stay enabled if you choose first USB Debugging)

1) Download all necessary files.

Downloads:

Update-Unsu-signed.zip: https://xdaforums.com/showpost.php?p=63615067

Huawei Extractor:https://xdaforums.com/showthread.php?t=2433454

Firmware b398-c432 update.zip:

http://update.hicloud.com:8180/TDS/data/files/p3/s15/G1864/g1755/v118152/f1/full/update.zip

SuperSU 2.82 SR5 - modified for SELinux Permissive and init.d support

https://www.androidfilehost.com/?fid=673956719939815322

2) Unzipp Firmware update.zip on PC and extract from UPDATE.APP with Huawei Extractor the boot.img

3) Copy the 3 files: boot.img - Update-Unsu-signed.zip - SuperSU 2.82 SR5 to your external SD

4) Make TWRP Backup of your device with all shown partitions - after reboot TWRP to fix the mount points

5) Open settings of TWRP and on the last Tab disable "keep vendor partition mounted" but leave enabled "Exclude OEM Path from data wipe"

6) Flash Update-Unsu-signed.zip to clean up your device from previous attempts to root

7) Restore your boot.img - go to install, choose on the right down corner "install img" and flash boot.img to boot

8) Flash SuperSU - first Reboot will be canceled, second boot will boot your device to system.

9) SuperSU apk should be somewhere on a blank site of your Homescreen - If you don't find SuperSU apk Unzipp SuperSU zip on PC and in the folder: common - you find Superuser apk - install it on your Phone

I made ROM based on this Firmware in two Edition, one rooted with this SuperSU, the other with Magisk, that's why I know that this SuperSU is working
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] telis_aigina:
[MENTION=6870018]Tecalote[/MENTION] hello again my friend just before 1 minute my phone pop a new update to b398 i have p9 l09c432b397 rooted what can i do now what you suggest
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
You can just Unroot (if you are rooted with SuperSU make Unroot directly from SuperSU App - if you get the question "restore boot.img" confirm two times) and after you must flash Stock Recovery b397 over TWRP (TWRP must be overwritten by Stock Recovery from current Firmware)

There's no guarantee that it will work - cause Stock Recovery makes check if something is modified and if it find anything, it will fail.

But if so, system will not modified.

Then you can use my HWOTA method:

https://xdaforums.com/showpost.php?p=74913874&postcount=3
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] knut.xda:
I have a problem withe the SuperSU app, it does not show the prompt dialog if an app assks for root access, it just seems to block forever.

If I disable the dialog in the SuperSU settings and choose allow instead, everything works fine and the su works.

My phone: Huawei P9 EVA-L09, B395, twrp-3.1.1-1-eva, SuperSU-v2.82

I already tried reinstalling SuperSU, but it did not help.

Any help would be appreciated.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Look into Phonemanager /Battery - SuperSU App must protected, so don't let it close on Lockscreen.

You can try also SuperSU SR5 Permissive from OP. (but it needs Unroot and restore boot.img before)
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] knut.xda:
Thanks very much, I had switched off the SuperSU protection. Now it works!
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] knut.xda:
My Huawei P9 EVA-L09 is on B395, rooted with TWRP and SuperSU.

I would like to update to B398.

I believe the easiest way to do it is via HWOTA.zip (https://xdaforums.com/showpost.php?p=74913874&postcount=3). Is that true?

If yes, do I have to go via B397 or is it possible to go directly to B398?

Does the update always include a complete factory reset? Or is it possible to do a real update?

Or is there a way to use the original OTA update? I could unroot via SuperSU, but what about TWRP? How do I restore stock recorvery? And will this not include a factory reset again?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
[MENTION=9000884]knut.xda[/MENTION] I would recommend you to use HWOTA method by me, no Unroot is required for that and EMUI Recovery will be flashed automatically. (which is necessary for Update)

You can't go directly to b398, this will fall.

You must first update to b397.

Bootloader will maybe get closed.

Factoryreset is required in every case.

Because if you are rooted and you Unroot and flash Stock Recovery - the official OTA will fail, cause the official Stock Recovery will check that your system was modified before.

But not, if you use my method which is based on Atarii Recovery.

Backup your folders from internal storage and do Huawei Backup on the Phone to external SD. (without system settings and without system apps)

You can backup nearly everything and restore it after update and first setup.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] knut.xda:
[MENTION=6870018]Tecalote[/MENTION]: Thanks for your detailed advice! It is always very tricky to find out how things work in detail. Until now I have not worked with Huawei Backup.

I have found this http://www.stechguide.com/huawei-p9-b398-nougat-update/ on the web, it seems to promise an update without factory reset. Do you have any experience with this methode?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
This method will also wipe your internal storage and it's no guarantee that it will work - cause b398 is no FullOTA-MF-PV Version - it's only FullOTA

I know this method and it worked with b386 (EMUI 5.0) - which was the last FullOTA-MF-PV Version

The only possibility to update Firmware without Factoryreset is, if your phone is original Huawei Stock Firmware without Root and without any modification.

Then updates doesn't wipe anything..
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] knut.xda:
Well, that wasn't exactly what I wanted to hear :( As I installed busybox and adaway the system certainly is modified.

I'll give your way a try as soon as I have a bit more time. With a twrp backup I'll always have a way back.

Thanks again for your efforts.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] edricusty:
Hello. I have a PRA-LX1 on EMUI 5.0.1. I want to install SuperSU-2.82-SR5. Do it work ? I don't want to brick my phone. I have TWRP ver. 3.1.1 from this thread
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] edricusty:
Ok I've done that. That work nice. Confirmed on PRA-LX1 emui 5.0.1 with TWRP 3.1.1. Thanks!
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] pikuren:
Not entirely sure which to pick for my P10 Lite WAS-LX2. Anybody have any clarification?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
It's dependent on which Firmware you have. If you have Android 7 Nougat it should work with SuperSU 2.82 SR5 permissive (first one in OP) :

https://androidfilehost.com/?fid=673956719939815322

For further information check P10 Lite Threads.

TWRP: https://xdaforums.com/p10/how-to/twrp-how-to-root-p10-lite-t3617418

But if you have already Android 8 Oreo, there's TWRP Recovery by [MENTION=2642882]Pretoriano80[/MENTION] and you should use Magisk v16 stable.

TWRP:

https://xdaforums.com/p10-lite/development/recovery-twrp-3-2-1-0-t3783447

Magisk:

https://xdaforums.com/apps/magisk/official-magisk-v7-universal-systemless-t3473445
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] wayfarer1:
Which one should I use for my P10 lite, WAS-LX1, Nougat 7.0, EMUI 5.1.1 ? Thanks in advance.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Read the post one before yours. There's no difference in Root between LX1 and LX2 I guess.

I don't own this device.

But the linked SuperSU should work.

Maybe you can use alternatively Magisk also for Nougat - but please search in P10 Lite Thread to get more info about.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] toto6976:
Hier

I have Huawei p9 lite vns l31-c432b412.

I have unlocking bootloader, installed twrp 3.1.02 et supersu 2.82.

the super su binary calls for an update. when I do it, it does not work. After searching the site, I saw that version 2.82 was incompatible with emui 5 version 7.

I will uninstall supersu to install one of your tutorial.

is it compatible with my mobile?

if so, does the 'unroot' of supersu foncrionne with my recovery?

I thought then flash your supersu directly.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] ogisha:
Little bit offtopic, but anybody has stock l09 c432 b386 boot image?

I would really appreciate it.

Thank you.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Here you go: https://www.androidfilehost.com/?fid=673368273298957996
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
OP is updated now :)

Available are now 5 different versions of the same SuperSU 2.81 EMUI 5 and the Guide is also updated. :cowboy:

[MENTION=4119702]cline2[/MENTION] please read OP, below is a version for KangV based ROMs and the description how to do...

I have tested the method on my P9 (I dont use prerooted boot.img)

I unrooted my device and installed a preeroted boot.img by KangV

I just flashed after version 5 (the KangV Version) of SuperSU EMUI 5 and everything was good. No problems with developer options or anything. So I hope, it will work also for your device. It should be, since the script inside prerooted boot.img is the same.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] cline2:
That's weird. I flashed version 5. Still boot loop til emui recovery. Oh well I will stay with 2.79 for now.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Did you the steps I wrote in OP for the "KangV Version" before?

First uninstall SuperSU apk. (from settings /apps)

After extract boot.img from the Rom.zip, which you are have installed on your device. (by unzip) and flash original prerooted boot.img first with adb. Reboot your device.

After reboot to TWRP and flash 2.81 again - should work.

Phone should boot up then two times
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Its already tested on Mate 8 Nougat and it works

https://xdaforums.com/showpost.php?p=72448736&postcount=33
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] cline2:
Sorry I was busy. Just got home. I tried those steps.

Uninstall SuperSu.apk

Extract boot.img from MT8_A_EMUI5.0_B587_Kangvip.zip

Flash boot.img reboot to system then

Reboot to TWRP and flash 2.81

2.81 works but developer options still crashes
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] cline2:
Finally I got it to work!!!! Both Developer Options and 2.81 su binary up to date.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
That's good news! And what was the important detail to get it to work?

I would like to know, thanks :)
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] NeGriTa79:
I have P10 lite, rooted with supersu 2.79, original rom, can I install this supersu 2.81? Thank you

Inviato dal mio WAS-LX1A utilizzando Tapatalk
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] ogisha:
[MENTION=6870018]Tecalote[/MENTION]

Did you consider making phh's super user flashable zip?

E.g. I do not trust SuperSU anymore. Especially after recent events with latest versions. I am getting the impression that they are installing some backdoors to my device. :cyclops:

Thanks.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] jonezie:
Works perfectly. Thanks a lot :)
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
How did you root with 2.79? Did you use the 2.79 Emui SuperSU.zip?

Is there a working TWRP for your device which allows you to backup and restore your boot?

If yes you can backup boot before flashing - and I would try version 4, cause it works on P10 which is similar to P10 lite.

If it doesn't work restore boot with TWRP and try version 2 or 3
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Which device to you have?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] jonezie:
Huawei P9 EVA-L09 EMUI 5
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Sorry, I don't consider - please search the phh's superuser Thread.

An alternative is also Magisk. It has a good root solution. But it works not with all TWRPs and devices.

Which device to you have?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] ogisha:
I have p9 Eva l09 c432 b386.

I was rooted with SuperSU 2.79.

After I tried 2.81 I did not loose root but lost busybox. After I flashed busybox again (it is same with all instances) root checker programs could not detect it, just entered in it's own loop!? Some busybox installers said that device is not properly rooted.

Then I flashed stock b386 boot, you had sent me, in order to root again with 2.79, flash busybox and leave it like it is, but my bootloader has got locked again. It says it is not locked, but I am unable to install twrp not to unlock it again. I am getting message FAILED (remote: Command not allowed).

Now I am not rooted trying to figure out how to unlock bootloader, install twrp and root again. :crying:
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
[MENTION=4657522]ogisha[/MENTION] That's strange. Have you enabled OEM Unlock in developer Options and which busybox did you use to which path?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] cline2:
I had to find the right boot.img.

---------- Post added at 02:48 PM ---------- Previous post was at 02:43 PM ----------

Now 2.82v is out. I am afraid to update it. LOL
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] ogisha:
I flashed YDS busybox.

Oem unlock is is turned off and grayed out in developer settings.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
If you Unroot directly from SuperSU App (settings /Unroot) let SuperSU restore the original boot.img. You will be asked two times, confirm.

Phone makes reboot.

After boot to TWRP and flash SuperSU SR5 from OP.

If the SuperSU is not on Homescreen, extract the apk from SuperSU zip folder "common" and install it. Tell your result.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] toto6976:
Hi

I add that I have TWRP 3.1.0.2 installed.

C'est celui-là le bon SuperSu :

https://androidfilehost.com/?fid=673956719939815322

thanks for your answer. I do it this tonight.

I hope not to brick the mobile
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
You should make a backup with TWRP of all shown Partitions. In the worst case you can boot to TWRP and restore your phone.

I don't know if your TWRP supports the backup from data - if yes include it in the backup.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] toto6976:
Thanks. I do it tonight.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] toto6976:
Hi,

Do I have to back up EFS too?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
I haven't seen this partition on Huawei Devices.

I would Backup what's possible with TWRP
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] toto6976:
Hi

I deleted supersu 2.82.

I installed SuperSU 2.82 SR5 permissive.

Everything looks ok. More binary that requires an update.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] blitzball:
Will this work on Huawei P9 5.1.1 B393? And what Supersu should I use?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] toto6976:
Hello

My supersu has disappeared again. So I reinstalled it. Just after, I got this message before reboot on twrp: 'install twrp app'

I install or not ??
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] blitzball:
How the heck should I know? I'm a noobie too.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] lolifer:
hello I cannot get supersu working on my Huawei AScend XT2. Ive tried 2.79,2.81, and 2.82 along with every one of these in this post. Any help would be appreciated.

Build Number: H1711C07B130

Baseband version: 00032

Android version: 7.0
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
You don't need TWRP App, just disable it in Settings of TWRP.
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
SuperSU is outdated. It was discontinued by Chainfire because he retired. I recommend alternatively Magisk by Topjohnwu (you can find here on xda)
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] lolifer:
I understand but Magisk is very diffucult for some Huawei users such as myself that have f2fs encrypted /data. half the time does everything work. I would much rather an old school and simple SuperSU root that just works not to mention the compatibility and stability when it comes to sound. Magisk is hard at work in the sound department and props to them but still a ways to go IMHO
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
Magisk is dependent on TWRP (Whether it has encryption/decryption support or not)

If not, you can use this technique as reference:

boot.img/ramdisk.img patching in different situations:

https://xdaforums.com/showpost.php?p=77560239&postcount=27381
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] lolifer:
So from what I am hearing it is not possible to use a System root anymore?
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] Tecalote:
No, that's impossible (beginning with Android 7 only patching boot.img /Android 8 patching ramdisk.img - and Android 9 we will see/at the moment even those techniques are difficult)

System Root was possible on older Firmwares of Android 6...
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] crouso:
p9 lite vns-l21 emui 5.0.3 c432b503 - working

just wanted to confirm that this latest (without add.) is working with EMUI 5.0.3 on L21 C432 B503

now i just want to know how i can get dual-sim working on my device :)

HUAWEI P9 lite - VNS-L21C432B503 EMUI 5.0.3
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] zgfg:
For P9 (not P9 Lite), it is not possible to convert Single SIM to Dual SIM - it is possible to rebrand from L09 (Single SIM firmware) to L19 (Dual SIM firmware) but phone will not recognize the second SIM

Anyway, you are asking abiut P9 Lite which is different phone (different hardware and therefore different firmwares) from P9.

This is here P9 subforum, for P9 Lite questions look/ask on the P9 Lite subforum (there you will find other P9 Lite users and they maybe know the answer for your P9 Lite question)

https://xdaforums.com/huawei-p9lite
[Huawei P9 ROMs, Kernels, Recoveries, & Other Devel] elkinguerrabarreto:
how can install emui 5 in my p9 lite vns-L23C claro la