yashsingh1/xdaforums huggingface dataset:
[Galaxy A3, A5, A7, A8, A9 Android Development] CaPTaInPaWnZ:
Can anyone tell me how to install TWRP on a9 Pro SM-A910F i tried many time but when i click on volume up power and home button it was go to Custom Recovery Why??? I just flash TWRP again and again loke 4 t times but problem is same when i click on volume up power and home button it was go to custom recovery not TWRL recovery. HELP!!! SOLUTION PLZ !!!
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Just follow the install instructions EXACTLY as posted.
[Galaxy A3, A5, A7, A8, A9 Android Development] CaPTaInPaWnZ:
I follow Everything And In Odin Mode It says PASS!! but when go to recovery mode it opens custom recovery i tried it for 4 t times but problem is same Can you Help me ??
[Galaxy A3, A5, A7, A8, A9 Android Development] footskater:
what is your firmware version ?
[Galaxy A3, A5, A7, A8, A9 Android Development] CaPTaInPaWnZ:
Android Marshmallow 6.0.1 plz help
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
You're not paying attention to the install instructions.

It specifically states to boot to recovery IMMEDIATELY after flashing.

That means straight after odin says PASS.

No reboot to the OS and then twrp. If you don't follow the instructions implicitly then you will end up with stock recovery every time.
[Galaxy A3, A5, A7, A8, A9 Android Development] CaPTaInPaWnZ:
Now i Understand means After Odin Says PASS Device Get automatically Restart I have to uncheck that in Odin Option And When It says PASS immediately I have to click Volume up + Power Up + Home Button. M i Right??
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Yes this is exactly what us stated in the OP. [emoji55]
[Galaxy A3, A5, A7, A8, A9 Android Development] CaPTaInPaWnZ:
Ohhhh I am so sorry Bro for Frustrating :( but now i Understand properly :)
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
[emoji106]
[Galaxy A3, A5, A7, A8, A9 Android Development] CaPTaInPaWnZ:
Hey dude i tried what you say but when that teamwin wallpaper open then device get automatically restart means twrp recovery is not opening as you say when it says pass you have to click v up home and power button. I do that then i get that TWRP wallpaper Teamwin and then device get automatically Restart means twrp is not opening and then i again power off device and again do that but again device get in custom recovery Plz help! Why not TWRP is opening ??
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
What is your firmware build number?
[Galaxy A3, A5, A7, A8, A9 Android Development] CaPTaInPaWnZ:
MMB29M.A910FXXU1APL1

This is my Firmware Build Number Of A9 Pro SM-A910F PLZ HELP!
[Galaxy A3, A5, A7, A8, A9 Android Development] Satwik reddy:
Cant install twrp

I installed the twrp via odin and after that i directly rebooted into recovery by navigating the keys . Twrp image comes for a while and the phone restarts. I tried it for many times but i cant find any solution i will be grateful if someone suggests me .

---------- Post added at 04:04 PM ---------- Previous post was at 04:01 PM ----------

Even i am stucked with the same problem do u have any solutions plz suggest me
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
I'm aware of the issue. I'll be working on a fix as soon as I get chance. In the meantime could someone post the recovery image from the latest firmware?
[Galaxy A3, A5, A7, A8, A9 Android Development] CaPTaInPaWnZ:
Yes i have solution finally i rooted my A9 PRO SM-A910F i will give you a Firmware Version Of 2016 of a9 pro first you have to flash that firmware then you have to flash TWRP and then Flash SuperSU File Via Memory Card With Odin Will Give a link of That Firmware Version 2016 for A9 Pro and TWRP Recovery tar file and SuperSU File. I will give links Shortly
[Galaxy A3, A5, A7, A8, A9 Android Development] Ravi90909:
Twrp not working with apl1 firmware. After booting into Twrp device restarts every time. Pls help. Btw APL1 is with December security patch
[Galaxy A3, A5, A7, A8, A9 Android Development] footskater:
http://s000.tinyupload.com/?file_id=67306894581561653308

A9100ZCU1APK1 recovery image
[Galaxy A3, A5, A7, A8, A9 Android Development] Satwik reddy:
Thanks fr ua support
[Galaxy A3, A5, A7, A8, A9 Android Development] CaPTaInPaWnZ:
Successfully rooted a9 pro sm-a910f

- To Root Samsung Galaxy A9 PRO SM-A910F

First You Have To Enable OEM UNLOCK & USB DEBUGGING MODE From Developer Option.

Now Follow These Steps.

1) Boot Your Device Into Download Mode And Flash This Firmware Of A9 PRO SM-A910F 2016 With Using Odin

Link-

http://downloadmirror.co/U16/A910FXXU1APF8_A910FOLB1APF8_XXV.zip

2) Now Flash These TWRP RECOVERY On Your A9 Pro SM-A910F With Using Odin

Link-

http://www.mediafire.com/?diu6j15ki8qze62

This Time Your Device Will Not Get That TWRP Image and restarting you will successfully get into the TWRP RECOVERY

3) Now Boot Your Device Into TWRP RECOVERY and Flash This SuperSU File With Odin But Your SuperSU file must be in SD Card

Link-

http://thunderztech.com/download-and-install-supersu-v2-65/

After That Download Root Checker From Play Store Then Click On Verify Root It will take some Seconds To Verifying And Then SuperSU Request Will Automatically Occur.

Congratulations You Have Successfully Rooted Your Samsung Galaxy A9 PRO SM-A910F.

This Will Work 100000%

If You Have Any Doubts Ask Me Here.

Thank You!
[Galaxy A3, A5, A7, A8, A9 Android Development] Satwik reddy:
Okie ! I ll be doing this process! Thanks alot!
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
If this does not boot then you will have to bear with me. Samsung have not yet released the latest sources for this device, so I am unable to build the kernel from source.

twrp_3.0.2-1_sm-a910_a9100_5217

.
[Galaxy A3, A5, A7, A8, A9 Android Development] steberg:
I'll install the latest PK1 firmware tomorrow and will try your new recovery. Thank you for your effort!
[Galaxy A3, A5, A7, A8, A9 Android Development] slaveone1970:
Please then give us your feedback..
[Galaxy A3, A5, A7, A8, A9 Android Development] Satwik reddy:
Should i try using this file. Or should i wait for a while.

Thanks alot for support u have been giving all the time.:D
[Galaxy A3, A5, A7, A8, A9 Android Development] CaPTaInPaWnZ:
You Welcome!
[Galaxy A3, A5, A7, A8, A9 Android Development] steberg:
Flashed latest PK1 firmware and after reboot installed via odin twrp_3.0.2-1_sm-a910_a9100_5217. But it stops at boot up with the blue text Recovery booting and yellow text "Set warranty bit: something.... Anyway I reinstalled the PK1 again and it works fine on OEM recovery. I'll keep this firmware now if you want to try some more.
[Galaxy A3, A5, A7, A8, A9 Android Development] Ravi90909:
Is any way out for root apl1 firmware? Twrp not working. Pls help
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Compiled this with source built kernel, latest available being A910FXXU1APJ4. If this doesn't work not a lot I can do until Samsung releases updated source code.

If anybody wants to send a request to Samsung Open Source Release Center be my guest. As soon as they release it I'll recompile the kernel.

twrp_3.0.2-1_sm-a910_a9100_7217

.
[Galaxy A3, A5, A7, A8, A9 Android Development] footskater:
I just sent a request, i hope they will update the source code.

Thanks.
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
So we're saying the new build didn't boot?
[Galaxy A3, A5, A7, A8, A9 Android Development] footskater:
I was so pessimistic that i sent the request before trying...

But guess what?

IT IS ACTUALLY WORKING.

I just tried with A9100ZCU1APK1 and everything works perfectly. I flashed TWRP and supersu without any problem.

I just wanna say : Thanks a lot ashyx :good: you can update the op with this new file.
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Thanks for confirming.
[Galaxy A3, A5, A7, A8, A9 Android Development] shamhezbollah:
Hello everyone, i have a SM-A9100 running API2 firmware and I can't get it to boot.

I have flashed the api2 firmware, stock phone

Flashed twrp without auto reboot

Rebooted in recovery.

Formatted data

Flashed supersu

Flashed no verity no encryption ashyx

And rebooted only to be stuck at the Samsung logo.

The supersu is the sr5 version.

What am I doing wrong? And as I read footskater managed to make it work on the latest APK1. How did you manage? I can odin flash the APK1 now as I have downloaded all recent firmwares.

Any help would be very appreciated
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Formatted or wiped data?
[Galaxy A3, A5, A7, A8, A9 Android Development] shamhezbollah:
I formatted. The one TWRP asks you to write "YES". I hope that is the correct one.

I believe it was done correctly because after formatting, the internal storage was restored (i checked in TWRP by going to backup > select storage and the internal storage had its size, while before formatting it wrote 0 MB)

I do my best to thoroughly explain every step I took.
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Have you waited at least 10 mins to boot?
[Galaxy A3, A5, A7, A8, A9 Android Development] shamhezbollah:
I actually waited, don't know how long but I did wait. Should I retry and wait 10 full minutes to see?
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Do you see the flashing Samsung logo?

If so then wait at least 10 mins.
[Galaxy A3, A5, A7, A8, A9 Android Development] shamhezbollah:
Yes there was a flashing Samsung logo.

So let me retry now, just to make sure

A9100ZCU1API2 firmware

With the TWRP of the OP

Supersu sr5

No verity no encryption

Should I make any changes to the versions here? Or should we just try the latest APK1 firmware? With what versions though? Am free to test things.
[Galaxy A3, A5, A7, A8, A9 Android Development] footskater:
It should be working that way. Maybe you were not patient enough at the logo...

Anyway you can try with the new firmware and the new TWRP.
[Galaxy A3, A5, A7, A8, A9 Android Development] shamhezbollah:
Okay new TWRP and using the SR5 SUPERSU? Same procedure as the previous attempts. Trying now.
[Galaxy A3, A5, A7, A8, A9 Android Development] footskater:
Why not stable supersu 2.79 :p
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
2.79 sr3 is the latest.

http://download.chainfire.eu/1021/SuperSU/SR3-SuperSU-v2.79-SR3-20170114223742.zip
[Galaxy A3, A5, A7, A8, A9 Android Development] shamhezbollah:
Where can I find it? Give me a link if you have. If it worked for you then I believe it will work for me too.

I only use the sr5 because i read ashyx mention it in this thread. Other than that am used to downloading the one provided in step by step tutorials.

Tell me how and which versions you used to make it work please

---------- Post added at 10:36 PM ---------- Previous post was at 10:34 PM ----------

Downloading this, and will use it with the APK1 now.

Thanks guys!
[Galaxy A3, A5, A7, A8, A9 Android Development] mrlove6:
bro I just want to confirm that I've tried your last twrp build with the following builds and it works perfectly:

A910FXXU1APL1

A910FXXU1AQA1

good job :good:
[Galaxy A3, A5, A7, A8, A9 Android Development] shamhezbollah:
I am confirming that APK1 works with your last TWRP and the SR3 supersu. Phone booted in less than 5 minutes though.

Although you should correct the OP, the correct procedure is the one you've written on post number 5. Great work!

Any ideas on how to properly install gapps, like rock stable. That's what am gonna try doing tomorrow.
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Thanks, but the procedure is correct in the OP. Supersu tends to break the patch if flashed afterwards which is why you must flash the patch after supersu.
[Galaxy A3, A5, A7, A8, A9 Android Development] steberg:
Yes we have a winner! Thank you! Works great!

Beer incoming!
[Galaxy A3, A5, A7, A8, A9 Android Development] HARVEYHOANG:
A9100 with latest APK1

I confirmed that I can install successfully my A9 Pro SM-A9100 with:

- CHC-A9100ZCU1APK1-20161118030955.zip

- twrp_3.0.2-1_sm-a910_a9100_7217.tar

- SuperSU-v2.79-201612051815.zip

- open_gapps-arm64-6.0-nano-20170208.zip

Now, enjoy my phone with modern design, very good big screen, and high quality performance... Thanks the forum for the true potential of my phone.
[Galaxy A3, A5, A7, A8, A9 Android Development] Ravi90909:
thnx

Big big thnx ashyx for ur hard work . I successfully flash twrp and root my a910fd apl1. Keep it up bro. I appreciate ur work.
[Galaxy A3, A5, A7, A8, A9 Android Development] Satwik reddy:
Will this work with A910FXXU1APL1 ? Or should i wait for the kernel to be available?

---------- Post added at 09:39 AM ---------- Previous post was at 09:34 AM ----------

Hey can u plz tell me process ! Should i do the same procedure which ashynx as mentioned in the frst thread with the new twrp recovery? If not plz provide me the steps!:)
[Galaxy A3, A5, A7, A8, A9 Android Development] Ravi90909:
1. Go to download mode

2. Flash latest twrp don't boot

3. Format data

4.flash supersu s3 2.79

5. Flash encryption fix

6. Boot to Os it will take approx 6 to 7 min to complete.

Done.

---------- Post added at 11:59 AM ---------- Previous post was at 11:58 AM ----------

Same method as op described.
[Galaxy A3, A5, A7, A8, A9 Android Development] shamhezbollah:
One point to note is that smart manager optimizes SuperSU making it take a long delay to show when it prompts for access, make sure the SuperSU is not being optimized in smart manager.
[Galaxy A3, A5, A7, A8, A9 Android Development] footskater:
factory reset

[MENTION=4899305]ashyx[/MENTION] i am having issues after a factory reset. It is not a big deal but i also had this problem with the first release of TWRP.

After doing a factory reset in the system, when i try to reboot it always boot into recovery instead of system.

Am i doing something wrong ?

Thanks.
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Did you use a utility to boot to twrp?
[Galaxy A3, A5, A7, A8, A9 Android Development] footskater:
I always press up button + home + power.
[Galaxy A3, A5, A7, A8, A9 Android Development] Satwik reddy:
Should i boot into twrp to do factory reset or i shouldnt boot ? I didnt get i bro! Flashing encryption is done in twrp ryt!
[Galaxy A3, A5, A7, A8, A9 Android Development] Ravi90909:
Don't boot to Os. Boot in twrp n format data
[Galaxy A3, A5, A7, A8, A9 Android Development] Semseddin:
Can you give me the link of the seller ? I need to contact him and ask him to sell the firmware.

******************************************

I have been trying to flash A910F system to A9100 despereatly without any luck. I have seen many samsung devices from China and or korea being converted to flash global roms without an issue. Please, provide a solution if you can or i would appriciate a link for how to merge a910f system to be flashable with Odin to A9100.

https://www.youtube.com/watch?v=MQizjZeUDI0

( arabic custom made odin firmware for S5 Korea variants )

I tried to flash A910F image with flashfire but ended up with errors.
[Galaxy A3, A5, A7, A8, A9 Android Development] footskater:
It is impossible to flash A910F firmware on a A910 device. Sellers from aliexpress just flash gapps.
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
I don't understand what's preventing you from flashing a GAPPS package?

I going to look again at creating a flashable a910f rom for the A9100, but this time it will be a twrp flashable zip instead of a system image.

I think this way it should flash and boot. I have compared the 2 system images from both roms and they are pretty similar apart from the obvious.
[Galaxy A3, A5, A7, A8, A9 Android Development] Semseddin:
Hi,

First of all thanks for your support Asyhx. Flashing gapps obviously isn't an issue. A rom made from A910F would be a much better solution for all international A9100 owners. It would be a base for rom development of A9100 as well.
[Galaxy A3, A5, A7, A8, A9 Android Development] steberg:
Just fyi the new A9100ZCU1AQB2 firmware released today works great with [MENTION=4899305]ashyx[/MENTION] latest TWRP!
[Galaxy A3, A5, A7, A8, A9 Android Development] slaveone1970:
Thanks for this important new..
[Galaxy A3, A5, A7, A8, A9 Android Development] misrababbu:
I have done everything as mentioned above in my A9 pro with CHC-A9100ZCU1APK1-20161118030955.

1. Used odin3_v3.12.5 to install twrp_3.0.2-1_sm-a910_a9100_7217.tar.

2. In TWRP - Wipe-->format Data - (here was getting in red /data not mounted, and several others, not sure if that is fine).

3. Flash supersu s3 2.79.

4. Flash no-verity-no-encrypt_ashyx.zip.

5. Boot to OS.

Its booting fine to OS, but not rooting. What i am missing here guys? desperately need help asap. ashyx or anyone else who can help here...

---------- Post added at 04:21 AM ---------- Previous post was at 03:25 AM ----------

I got it rooted, below are the correct sequence of steps. Installed gapps open_gapps-arm64-6.0-nano-20170221.zip, but now getting annoying popup every second - Unfortunately google play service has stopped.

1. Enable developer access in Setting.

2. Enable USB debugging.

3. Restart -->volume down+power+home

4. Used odin3_v3.12.5 to install twrp_3.0.2-1_sm-a910_a9100_7217.tar.

3. Volume up+power+home

4.. In TWRP - Wipe-->format Data - (here was getting in red /data not mounted, and several others, not sure if that is fine).

5. Flash supersu s3 2.79.

6. Flash no-verity-no-encrypt_ashyx.zip.

7. Boot to OS.

8. disable Knox.

9. download Root checker and verify Root- Success!!

10. Restart to TWRP and flash - open_gapps-arm64-6.0-nano-20170221.zip.

May be i have latest Gapps which is giving issue, any recommended Gapps and link to download?
[Galaxy A3, A5, A7, A8, A9 Android Development] tiennhu89:
Try wipe cache in Google play services app. Maybe it can help.
[Galaxy A3, A5, A7, A8, A9 Android Development] Semseddin:
https://www.youtube.com/watch?v=bvpuhBsQ6N8
[Galaxy A3, A5, A7, A8, A9 Android Development] edit:
First of all many, many thanks to all that contributed !

Without you guys my phone would have been very bad because it was sold with a strange firmware plagued by dubious apps that lagged like crazy, somtimes even freezing for 1-2 seconds.

Since I am no expert in the flashing matters and Android, after I followed the tutorial above I realized that if my phone will be stolen they can access all my internal data via TWRP because the data partition is mountable and browsable.

Will everything still function ok If would not format and SKIP step 3 and also SKIP flashing the encryption fix so the data would be not visible and i guess the partition not mountable in TWRP? What will be the downside if I will skill those steps and what exactly does the encryption fix (no-verity-no-encrypt_ashyx.zip)

I usually save my pictures and my personal stuff to the internal memory and I would like to have some basic protection.

Thank you !
[Galaxy A3, A5, A7, A8, A9 Android Development] tiennhu89:
U can find ur answer at #1.
[Galaxy A3, A5, A7, A8, A9 Android Development] misrababbu:
Yes I did that already and that worked, but now every time i restart it gives warning you are running non authorized app or something.

also please let me know what apps i can delete from the supplied phone, my wife is hating every time she sees the chines fonts.
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Freeze or remove 'security log agent'.
[Galaxy A3, A5, A7, A8, A9 Android Development] misrababbu:
Thanks Ashvyx, I will try that.

Do you know what apps i can remove from the supplied phone, which will not harm the phone?
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Best advice I can give is first and foremost is to make a full backup with TWRP. Even though it's common sense and a no brainer, many do not do this step and end up in trouble.

Download an app called System App Remover (root).

With this app everything you remove can be restored if it causes an issue.

Sometimes it's better to just freeze apps with titanium backup.

You don't really gain anything by removing system apps, you won't gain any more space.
[Galaxy A3, A5, A7, A8, A9 Android Development] misrababbu:
Thanks Ashyx, you have been real help. One more thing though, is there any way to remove the Chines characters from the startup screen? where it says Android custom..

Also is there any way to install full or stock gapps pack it says only 150MB space left.
[Galaxy A3, A5, A7, A8, A9 Android Development] farzii:
Hi all i tried flashing twrp on a9 pro 910f/ds twrp boots but gets stuck on twrp screen and doenst boots to recovery.pls help
[Galaxy A3, A5, A7, A8, A9 Android Development] misrababbu:
What odin and twrp version you are using?
[Galaxy A3, A5, A7, A8, A9 Android Development] farzii:
Odin3_v3.12.3

twrp_3.0.2-1_sm-a910f_25716.tar

i tried twrp_3.0.2-1_sm-a910_a9100_5217.tar but it doesnt even boot to twrp logo.

model no SM-910F/DS

build no mmb29m.a910fxxu1apl1

pls guide how to root and flash twrp. its a great device but no xda support on this.
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Only this version will work on your device : twrp_3.0.2-1_sm-a910_a9100_5217

Explain what the issue is. Screen shots if possible and have you OEM UNLOCKED?
[Galaxy A3, A5, A7, A8, A9 Android Development] aspiens:
Hi!

available unlocked 9100. Last February firmware MMB29M.A9100ZCU1AQB2 . To flash -twrp_3.0.2-1_sm-a910_a9100_5217 the device will not boot. In recovery also not loaded. I sew the previous version - A9100-PC4-TWRP-3.02-0405.tarthe device is loaded, but recovery buttons are inactive. Any action in recovery and immediately restart. What to do? Thanks for the answer.
[Galaxy A3, A5, A7, A8, A9 Android Development] steberg:
Get the twrp_3.0.2-1_sm-a910_a9100_7217.rar version. The 5217 does not work on 9100 pro. ReRead the thread.
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
Thanks for pointing that out, hadn't realised the link was wrong in the OP!

Corrected.
[Galaxy A3, A5, A7, A8, A9 Android Development] syafiqjoe:
hi [MENTION=4899305]ashyx[/MENTION] i have make all ur procedure carefully flash twrp with odin>boot to twrp> format data>flash boot patcher>flash supersu and reboot. its all ok and got root access but have something wrong i got,after reboot boot to twrp cant mount data again, and internal still encrypt. so if i wish to backup data it cant backup. any idea? have do 2time and got like this. thanks
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
You did the procedure wrong. It specifically states to flash the patch AFTER supersu.
[Galaxy A3, A5, A7, A8, A9 Android Development] syafiqjoe:
[MENTION=4899305]ashyx[/MENTION] so the procedure like this right? if correct i make again. try and error. :)

flash twrp with odin>boot to twrp> format data>flash supersu>flash boot patcher> and reboot

thanks
[Galaxy A3, A5, A7, A8, A9 Android Development] farzii:
FLashed this version.but gets stuck on the screen below.by oem unlock do u mean in developer options,if not ,pls also tell how to oem unlock.
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
That was the wrong version.

OP has been corrected.

This one should work. https://www.androidfilehost.com/?fid=457095661767135545
[Galaxy A3, A5, A7, A8, A9 Android Development] farzii:
It worked..rooted too..cn u suggest for xposed too?
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
https://xdaforums.com/xposed/unofficial-xposed-samsung-lollipop-t3180960
[Galaxy A3, A5, A7, A8, A9 Android Development] lrcquest:
Are there any custom roms for A9pro?
[Galaxy A3, A5, A7, A8, A9 Android Development] alexutu_d:
With the last link from ashyx I was able to install Open GApps micro and finally I have a functional A9 Pro. Thank you all for the support! I can now regard my A9 Pro as a great, powerful device with an immensely long lasting battery. This is how forums should work.
[Galaxy A3, A5, A7, A8, A9 Android Development] djurkash:
Looks like no, still l haven't checked Chinese forums...There might be something...

Mi MAX
[Galaxy A3, A5, A7, A8, A9 Android Development] m.lateef:
oem unlock

i have sm-a9100, iam facing this block problem beacuse i dont have OEM LOCK/UNLOCK option in developer options.
[Galaxy A3, A5, A7, A8, A9 Android Development] ashyx:
You need to install CROM service.apk