Develop Bugs

[Q] Issues unlocking bootloader Sony Xperia Arc S LT18i

Hello all,
I've got an Arc S that I've been trying to unlock the bootloader on using Sony's method, without success.
1. I have fastboot and adb installed on my machine (Linux Mint 14 32bit)
2. I've pulled the unlock code from Sony's website
3. I set my udev rules as laid out in this tutorial.
4. I have checked my bootloader to confirm that it can be unlocked (and currently is locked)
5. Fastboot is working (When I type in sudo fastboot devices, I get a hexadecimal string in response)
6. However, when I try to unlock, it always fails.
Initially, it gave me a "oem unlock failure code". After I rebooted thought, the code changed. Instead of something like this
Code:
oem unlock failed!
it gave me this
Code:
...
and did nothing. I let it sit for a few minutes and then forcibly shut down terminal, no damage done to the phone.
I'm quite confused at this point. From all my google searching I can't figure out why the booloader won't unlock. I'm pretty sure that I have the right unlock code.
A second and curious thing that may or may not be related is that the phone is rooted, but when I tried to transfer CWM via fastboot it threw an error, saying that the phone needed to be rooted first. However, it is rooted and apps such as Titanium Backup work just fine, verifying the root. Can anyone give me some direction on this?

I know there is a video on the how to unlock lt18i bootloader. It also has step by step process on fixing issues for unlocking bootloader. Lemme get.it for ya.
Sent from my LT18i using xda premium

May be a relatively simple thing. Is your phone simlocked? This may have some bearing on it.

sinkster said:
May be a relatively simple thing. Is your phone simlocked? This may have some bearing on it.
Click to expand...
Click to collapse
I don't believe that it is simlocked. I don't believe the phone was purchased through a carrier. For clarification, this is a friend's phone so I would need to ask them as to where they purchased it.

sinkster said:
May be a relatively simple thing. Is your phone simlocked? This may have some bearing on it.
Click to expand...
Click to collapse
No, it is not simlocked, else it would not show Bootloader Unlock Allowed: Yes
To OP: Write out the command you used to unlock the bootloader.

Someguyfromhell said:
No, it is not simlocked, else it would not show Bootloader Unlock Allowed: Yes
To OP: Write out the command you used to unlock the bootloader.
Click to expand...
Click to collapse
As taken from the Cyanogenmod Wiki page for Anzu devices:
Code:
fastboot -i 0x0fce oem unlock 0xKEY
where KEY was the bootloader unlock I received from Sony.

The dots indicate the software's not detecting your device. I had the same problem. Try reinstalling the drivers. If it still fails, maybe you can give the method outlined in the link below a go. It's for the relatively newer Sony devices, but maybe it'd work with the Arc. I haven't personally tried unlocking via Flashtool, but for me, the Fastboot command-based experience hasn't been all too good. I now use the Fastboot option in Flashtool, as opposed to standalone Fastboot, to flash every kernel that I use. Works like a charm each time, and what's more, it does away with the need to key in commands in the exact syntax.
http://forum.xda-developers.com/showthread.php?t=1971363

MarcSinger said:
The dots indicate the software's not detecting your device. I had the same problem. Try reinstalling the drivers. If it still fails, maybe you can give the method outlined in the link below a go. It's for the relatively newer Sony devices, but maybe it'd work with the Arc. I haven't personally tried unlocking via Flashtool, but for me, the Fastboot command-based experience hasn't been all too good. I now use the Fastboot option in Flashtool, as opposed to standalone Fastboot, to flash every kernel that I use. Works like a charm each time, and what's more, it does away with the need to key in commands in the exact syntax.
http://forum.xda-developers.com/showthread.php?t=1971363
Click to expand...
Click to collapse
I tried unlocking the bootloader via Flashtool and I got the same result of
Code:
oem unlock failed!
. So that means that something is wrong with my fastboot installation (not likely)my udev rules(possible) or for some crazy reason the phone is not reporting back correctly. A curious thing I noted is that when the phone is detected via adb it doesn't return the phone's IMEI. It does return a number, but it does not match the IMEI. Has anyone ever heard of that situation?

Guanfy said:
I tried unlocking the bootloader via Flashtool and I got the same result of
Code:
oem unlock failed!
. So that means that something is wrong with my fastboot installation (not likely)my udev rules(possible) or for some crazy reason the phone is not reporting back correctly. A curious thing I noted is that when the phone is detected via adb it doesn't return the phone's IMEI. It does return a number, but it does not match the IMEI. Has anyone ever heard of that situation?
Click to expand...
Click to collapse
I don't believe Fastboot returns the phone's IMEI. It's always looked to me like a random number that's generated to show successful connectivity between the device and the Fastboot program. But then again, I could be wrong.
Anways, despite the message you got, it's looking increasingly likely that your bootloader cannot be unlocked.
PS: You retired your SGS III, but kept your Arc? The decision really befuddles me.

MarcSinger said:
I don't believe Fastboot returns the phone's IMEI. It's always looked to me like a random number that's generated to show successful connectivity between the device and the Fastboot program. But then again, I could be wrong.
Anways, despite the message you got, it's looking increasingly likely that your bootloader cannot be unlocked.
PS: You retired your SGS III, but kept your Arc? The decision really befuddles me.
Click to expand...
Click to collapse
After much research I've found that when you get the "remote: oem unlock failed!" message it means you've enter an incorrect unlock code. Thing is, I know that I have entered the IMEI correctly on Sony's website, so I'm stumped there. I tried this setup in windows and got the same result, so I don't think it's fastboot or drivers anymore. It makes me wonder why I would be getting an incorrect unlock code...
To answer your PS, this phone belongs to a friend of my whom I'm doing a favor for. Note I don't have the Arc S in my sig. My retired SIII went to my wife, who was quite happy to have it.

Guanfy said:
After much research I've found that when you get the "remote: oem unlock failed!" message it means you've enter an incorrect unlock code. Thing is, I know that I have entered the IMEI correctly on Sony's website, so I'm stumped there. I tried this setup in windows and got the same result, so I don't think it's fastboot or drivers anymore. It makes me wonder why I would be getting an incorrect unlock code...
To answer your PS, this phone belongs to a friend of my whom I'm doing a favor for. Note I don't have the Arc S in my sig. My retired SIII went to my wife, who was quite happy to have it.
Click to expand...
Click to collapse
Are you sure that you left out the LAST number of the IMEI, when entering it on the website? You need to do that, else you get invalid code.

Someguyfromhell said:
Are you sure that you left out the LAST number of the IMEI, when entering it on the website? You need to do that, else you get invalid code.
Click to expand...
Click to collapse
Yup, that I have. I originally entered the 15 digit code and the website threw an error, so I deleted the last digit to get the unlock code that I tried.

same issue as LT26ii
Well I have exactly the same issue at my Xperia SL LT26ii, it just shows "oem unlock failed", do anyone know how to fix this ?

nkiy said:
Well I have exactly the same issue at my Xperia SL LT26ii, it just shows "oem unlock failed", do anyone know how to fix this ?
Click to expand...
Click to collapse
oem unlock failed

Problem solved!
Hey guys, I just unlocked my LT26ii after many times of "oem unlock failed". Here's my solution:
0. well first just remember your IMEI code, cause later it will changed.
1. Download a new firmware in ftf format.
2. Update firmware with Flashtool.
3. Turn on your phone and get you imei code. Now you should got a new one different from the previous one.
4. Use the NEW imei to unlock your phone.
Good Luck !
PS: dont guarantee that worked but if it does please let'me know.

Unlocking Bootloader Trouble

Hello,
I bought a Sony Xperia Acro S off eBay and the seller must have forgotten to mention that it's a Chinese version phone.
Navigating settings and switch the language to English was simple enough, but then I realize it's bloated with Chinese apps and lacks 'Play Store' and has something called 'PlayNow' in its place -- which is the real problem.
After searching a while I decided my best bet would be to unlock the bootloader so that I could install something different using Sony's flashing tool.
This, of course, requires me to first unlock the bootloader.
I attempted to follow the directions at the Sony 'unlock boot loader' sire in order to do this, but unfortunately at step 15 things don't go well for me and when I enter the command prompt fastboot.exe -i 0x0fce getvar version , instead of getting a version return I get a list of command (attachment) options and I have yet to find anywhere after 8 hours of forum searching to tell me what to do. All I see is, "You should get..." yeah, well... I should... but I don't.
My next move was to try and use flashtool in order to unlock the bootloader. So I downloaded it, installed it, then installed the accompanying driver program with all boxes checked.
I clicked the BLU button and set it to flashmode as it told me, then switched to fastboot mode as it told me, then it when it gets to the unlocking part o the process it shows my IMEI number and asked for the bootloader key that Sony sent me.
I'm feeling pretty good at this point and enter the key and then what do I see? FAILED (remote: oem unlock failed!)
I really don't know what my next move is. I'm just hoping someone her has my missing information.
If anyone has any ideas I'd appreciate it. Thanks.

Try Again, make sure you entered the right IMEI Key (i acidently typed the wrong one a couple of times)
also make sure Fastboot, ADB are installled, (ALSO make sure that the drivers for the Device are installed)
if you need anything just ask or google it, im sure someone else can help you more than i can aswell
If all fails your boot-loader may be non UNLOCKABLE

Envious_Data said:
Try Again, make sure you entered the right IMEI Key (i acidently typed the wrong one a couple of times)
also make sure Fastboot, ADB are installled, (ALSO make sure that the drivers for the Device are installed)
if you need anything just ask or google it, im sure someone else can help you more than i can aswell
If all fails your boot-loader may be non UNLOCKABLE
Click to expand...
Click to collapse
It is unlockable... that's one of the first steps. Don't forget that Sony even sent me the unlock key.
The IMEI is automatically detected by flashtool and it is uneditable. It's correct nonetheless.

Unlock Code sending by Sony
kcorrie4 said:
It is unlockable... that's one of the first steps. Don't forget that Sony even sent me the unlock key.
The IMEI is automatically detected by flashtool and it is uneditable. It's correct nonetheless.
Click to expand...
Click to collapse
Hi, I have an unlock code given from official Sony Developer website, but i can't go into flashboot mode ( unlock alowed: no ). There is any way to impact the unlock code given?
Thanks
[Xperia Acro HD, rooted, cwm, unlock allowed: no]

lollipop OTA fail

Hi guys I got the lollipop OTA for my nexus ( completely stock), never tinkered with it and the OTA installed but now its stuck on "google" screen and constantly bootloops. I have done some reading and I tried to unlock bootloader via Wugfresh toolkit and normal fastboot oem method but no avail, it gets stuck on the "yes" option.
Basically I have a locked bootloader which fails to unlock, and nexus stuck in google logo, any guidance will be much appreciated. Plz point me towards the right direction. :crying:

Try to unlock the bootloader from adb with OEM unlock command. The steps are posted above the factory images on Google's dev site.

yeah I tried that and tablet gets stuck on the yes option at unlock bootloader screen and nothing happens for 20 minutes , i have to restart it. I've read around and it seems like my emmc might have corrupted. Any pointers?

Nxpx said:
yeah I tried that and tablet gets stuck on the yes option at unlock bootloader screen and nothing happens for 20 minutes , i have to restart it. I've read around and it seems like my emmc might have corrupted. Any pointers?
Click to expand...
Click to collapse
Well I can only think of one thing. Buy a new nexus. There aren't any listings for the Wi-Fi version and the LTE on Swappa. However there is some other devices on Swappa.

Cannot boot into bootloader/fastboot

Hello guys I have H815 and I can't proceed with unlocking bootloader cause my phone cannot boot into bootloader/fastboot mode. I'm not newbie, but with this phone everything goes ****ing different than in instruction.
I the instruction there is adb reboot bootloader. Of course my phone is seen in adb mode but after this command it just reboot to system. I tried also key combinations with no luck...
What to do?
My system is android 6

remialfa said:
Hello guys I have H815 and I can't proceed with unlocking bootloader cause my phone cannot boot into bootloader/fastboot mode. I'm not newbie, but with this phone everything goes ****ing different than in instruction.
I the instruction there is adb reboot bootloader. Of course my phone is seen in adb mode but after this command it just reboot to system. I tried also key combinations with no luck...
What to do?
My system is android 6
Click to expand...
Click to collapse
Hi,
I'm the same...
looking for solution I found this on Youtube:
Pratically, you have to press vol up while connect USB on PC....
I haven't the G4 with my today and so I cannot test if this is a valid mode...
If you do this, let me know if you can enter in fastboot mode

auceto63 said:
Hi,
I'm the same...
looking for solution I found this on Youtube:
Pratically, you have to press vol up while connect USB on PC....
I haven't the G4 with my today and so I cannot test if this is a valid mode...
If you do this, let me know if you can enter in fastboot mode
Click to expand...
Click to collapse
I did that and yeah it entered this mode but it's not valid bootloader/fastboot mode. It's some service mode to update firmware. Anyway it's not visible in pc as a normal fastboot and I cannot proceed further with unlocking bootloader...
Edit: it's download mode... So as I said it's not fastboot mode.
Anyone can help?

Seriously nobody? I thought this phone has good community and support...

I'm facing the exact same problem with my H810 on 6.0. Sick of not being able to root atleast.
Seriously hasn't anyone on earth found a way to boot this **** in fastboot? I mean there are a number of tutorials but everything goes different as F*** with this thing. Hope someone will update with good news. :fingers-crossed::fingers-crossed:

charith262 said:
I'm facing the exact same problem with my H810 on 6.0. Sick of not being able to root atleast.
Seriously hasn't anyone on earth found a way to boot this **** in fastboot? I mean there are a number of tutorials but everything goes different as F*** with this thing. Hope someone will update with good news. :fingers-crossed::fingers-crossed:
Click to expand...
Click to collapse
You can check out UsU. That is an unofficial bootloader unlock

ThePiGuy said:
You can check out UsU. That is an unofficial bootloader unlock
Click to expand...
Click to collapse
Thanks yeah I checked but that's for ARB<=2 devices. I forgot to mention earlier this godforsaken thing is ARB3.

I have an H811 (T-Mo) running firmware H81120p, ARB3. Doesn't seem to be much that can be done with it as far as rooting. It also has no stock recovery, only boots to system.

you did follow this official guide right? it unlocked mine after a few angry moments
http://developer.lge.com/resource/mobile/RetrieveBootloader.dev
use minimal ADB https://forum.xda-developers.com/showthread.php?t=2317790
Only way to boot twrp later is to use fastboot with ADB, recovery with buttons doesn't work.
if the device wont boot a rom use adb to get back in recovery.
if you use bank apps, install magisk before installing rom, do not get SU

samadee3 said:
you did follow this official guide right? it unlocked mine after a few angry moments
http://developer.lge.com/resource/mobile/RetrieveBootloader.dev
use minimal ADB https://forum.xda-developers.com/showthread.php?t=2317790
Only way to boot twrp later is to use fastboot with ADB, recovery with buttons doesn't work.
if the device wont boot a rom use adb to get back in recovery.
Click to expand...
Click to collapse
Only problem is that the info linked to above applies to ONE G4 variant only - the H815 international model. The rest of us are SOL. The bootloader on US carrier G4 - AT&T, T-Mo, VzW, etc (most later firmware revisions for G3 as well) models has been nailed down. The only exception is a G4 with ARB <= 2 can be hacked with UsU in order to root it and install a custom recovery.

SofaSpud said:
Only problem is that the info linked to above applies to ONE G4 variant only - the H815 international model. The rest of us are SOL. The bootloader on US carrier G4 - AT&T, T-Mo, VzW, etc (most later firmware revisions for G3 as well) models has been nailed down. The only exception is a G4 with ARB <= 2 can be hacked with UsU in order to root it and install a custom recovery.
Click to expand...
Click to collapse
Tmo is very easy
Go to dev options and enable adb
Then run "adb reboot bootloader"
Once there, run "fastboot oem unlock" and voila, you have an officially unlocked bootloader with no restrictions related to UsU
Please be aware the above will factory reset your device

ThePiGuy said:
Tmo is very easy
Go to dev options and enable adb
Then run "adb reboot bootloader"
Once there, run "fastboot oem unlock" and voila, you have an officially unlocked bootloader with no restrictions related to UsU
Please be aware the above will factory reset your device
Click to expand...
Click to collapse
Do you know anyone who has done it with H81120o or later? I've seen posts for two yrs about doing it that way, but I don't remember reading about it being done on 20o or later.
Sent from my SAMSUNG-SM-G935A using Tapatalk

SofaSpud said:
Do you know anyone who has done it with H81120o or later? I've seen posts for two yrs about doing it that way, but I don't remember reading about it being done on 20o or later.
Click to expand...
Click to collapse
Why v20o
Remember, this has nothing to do with UsU and therefore ARB etc doesn't matter
Edit: ps there are loads of H811 users in my Lineage thread and the other ROMs too

ThePiGuy said:
Why v20o
Remember, this has nothing to do with UsU and therefore ARB etc doesn't matter
Edit: ps there are loads of H811 users in my Lineage thread and the other ROMs too
Click to expand...
Click to collapse
Got it. Guess that it makes sense. ARB prevents rolling back to earlier release than 20o, I'm ok. Will try the BL unlock today then.
Sent from my SAMSUNG-SM-G935A using Tapatalk

I actually managed to get my LG V20 F800L into same situation after messing up my rooting process.
First i was stuck at logo and factory reset did nothing. Bootloader was working then.
Then i downloaded new firmware through "Download Mode", and after that i lost access to bootloader.
I know the phone model is different, but process seems to be very similar for all LG devices.
Trying to troubleshoot that atm, if i'll have results i'll post them here.
P.S. I know original poster long left (probably after throwing phone into a grinder), but maybe for someone with same problem as us in the future the info will be useful.

Florimer said:
I actually managed to get my LG V20 F800L into same situation after messing up my rooting process.
First i was stuck at logo and factory reset did nothing. Bootloader was working then.
Then i downloaded new firmware through "Download Mode", and after that i lost access to bootloader.
I know the phone model is different, but process seems to be very similar for all LG devices.
Trying to troubleshoot that atm, if i'll have results i'll post them here.
P.S. I know original poster long left (probably after throwing phone into a grinder), but maybe for someone with same problem as us in the future the info will be useful.
Click to expand...
Click to collapse
Ok, now i have to reply to my own post, since i believe i understand now something important:
LG phones usually dont have bootloader open to access. Until you use some exploits to do so.
I did not know that at the time of writing that reply.

Florimer said:
Ok, now i have to reply to my own post, since i believe i understand now something important:
LG phones usually dont have bootloader open to access. Until you use some exploits to do so.
I did not know that at the time of writing that reply.
Click to expand...
Click to collapse
Do you have more details about this? I seem to be in a similar situation than you and I'm struggling to make it work.

Need help unlocking my Note 4

Hello,
I have a Sprint Galaxy Note 4 I'd like to unlock. I called sprint and got the unlocking code. I was to wait 72 hours for the phone to be fully unlocked. Then, I needed to swap my sprint SIM with a different network SIM, and the phone would prompt me to enter the code, and that would be it. Unfortunately, I received an email with the following message:
Letting you know your CPO SAM N910 WHT SNGL on line XXXXXXXXXX cannot be
unlocked due to programming restrictions associated with phones like
yours that were manufactured before February, 2015. You can try
providing your master subsidy lock (MSL) code XXXXXX to your new
carrier to find out if it will work on their network.
Keep in mind we can't guarantee your older phone will operate correctly
on another carrier's network. Each wireless provider determines whether
or not they will utilize the MSL code to reprogram a phone for use on
their network.
Click to expand...
Click to collapse
I put a different SIM in my phone, boot it up, and I get an invalid SIM error, but the phone does not prompt me to enter a code.
I have read and seen multiple Note 4, including the Sprint variant, being unlocked. Does anyone know what I need to do to unlock it?
Thanks

Aloupha said:
Hello,
I have a Sprint Galaxy Note 4 I'd like to unlock. I called sprint and got the unlocking code. I was to wait 72 hours for the phone to be fully unlocked. Then, I needed to swap my sprint SIM with a different network SIM, and the phone would prompt me to enter the code, and that would be it. Unfortunately, I received an email with the following message:
I put a different SIM in my phone, boot it up, and I get an invalid SIM error, but the phone does not prompt me to enter a code.
I have read and seen multiple Note 4, including the Sprint variant, being unlocked. Does anyone know what I need to do to unlock it?
Thanks
Click to expand...
Click to collapse
Use this tool to permanently unlock your device.
Download link for tool is in video description.
Screw the carrier
By this tool you can unlock all Samsung sprint devices.
https://youtu.be/tkrI7PTaZqA
Tool is free but watch carefully and follow instructions exactly as shown in video.
Let me know if it worked for you.

Trex888 said:
Use this tool to permanently unlock your device.
Download link for tool is in video description.
Screw the carrier
By this tool you can unlock all Samsung sprint devices.
https://youtu.be/tkrI7PTaZqA
Tool is free but watch carefully and follow instructions exactly as shown in video.
Let me know if it worked for you.
Click to expand...
Click to collapse
Thanks - it's kind of hard to follow the instructions. It's unclear what he is doing.
It would appears that you first place the phone in download mode. In his instruction, he attempted to do that, but the phone rebooted. Is this a necessary step? Then he put the phone in recovery mode. But after that, he doesn't show you want happens. He simply moves on to unlocking a different phone. Is simply putting the phone in recovery mode unlock it? I doubt it... do I click on the Unlock button while in download mode to unlock it? It's not clear

Aloupha said:
Thanks - it's kind of hard to follow the instructions. It's unclear what he is doing.
It would appears that you first place the phone in download mode. In his instruction, he attempted to do that, but the phone rebooted. Is this a necessary step? Then he put the phone in recovery mode. But after that, he doesn't show you want happens. He simply moves on to unlocking a different phone. Is simply putting the phone in recovery mode unlock it? I doubt it... do I click on the Unlock button while in download mode to unlock it? It's not clear
Click to expand...
Click to collapse
Follow these steps exactly
Before you begin you must have samsung usb drivers installed in your windows pc.
1 download cdma yemen tool that i mentioned in my earlier replies.
2 put your phone in adb mode by dialing ##3424# and choose adb+dm (very important)
3 reboot device
4 open tool and connect your device via usb cable (WATCH OUT CAREFULLY FOR ANY POP UP WINDOW ON YOUR PHONE YOU MUST ALLOW PERMISSION TO CONNECT DEVICE WITH TOOL.
5 inside tool click on port/adb and select your device.
6 choose your correct model N910P of you have Note 4 sprint.
6 click UNLOCK TAB in tool and wait until your device will reboot automatically.
thats it.
After reboot hopefully you have permanently unlocked device.
If your device successfully unlocked then dial ##3424# and select mtp+adb back to normal.
The guy is showing in video all the stuff that this tool can do so dont go to download mode or recovery or anything because that's for removing frp lock and other stuff.
Let me know if it worked for you.
By the way if you are on latest QI5 firmware i am not 100% sure this tool will work because QI5 has latest bootloader/modem and it's not easy to unlock.
If this tool did not work for you let me know i have workaround.
Good luck

Trex888 said:
Follow these steps exactly
Before you begin you must have samsung usb drivers installed in your windows pc.
1 download cdma yemen tool that i mentioned in my earlier replies.
2 put your phone in adb mode by dialing ##3424# and choose adb+dm (very important)
3 reboot device
4 open tool and connect your device via usb cable (WATCH OUT CAREFULLY FOR ANY POP UP WINDOW ON YOUR PHONE YOU MUST ALLOW PERMISSION TO CONNECT DEVICE WITH TOOL.
5 inside tool click on port/adb and select your device.
6 choose your correct model N910P of you have Note 4 sprint.
6 click UNLOCK TAB in tool and wait until your device will reboot automatically.
thats it.
After reboot hopefully you have permanently unlocked device.
If your device successfully unlocked then dial ##3424# and select mtp+adb back to normal.
The guy is showing in video all the stuff that this tool can do so dont go to download mode or recovery or anything because that's for removing frp lock and other stuff.
Let me know if it worked for you.
By the way if you are on latest QI5 firmware i am not 100% sure this tool will work because QI5 has latest bootloader/modem and it's not easy to unlock.
If this tool did not work for you let me know i have workaround.
Good luck
Click to expand...
Click to collapse
I am on QI5, and I didn't see a adb+dm option. I did see a DM + MODEM + ADM option under QUALCOMM USB SETTING (see attached screenshot), so I selected that.
The tool says Unlock Done With out Root... but it doesn't appear that the phone was indeed unlocked.
What's the workaround you have?

Aloupha said:
I am on QI5, and I didn't see a adb+dm option. I did see a DM + MODEM + ADM option under QUALCOMM USB SETTING (see attached screenshot), so I selected that.
The tool says Unlock Done With out Root... but it doesn't appear that the phone was indeed unlocked.
What's the workaround you have?
Click to expand...
Click to collapse
Yes DM+MODEM+ADM i was meaning.
The workaround i have is you have to flash Twrp RECOVERY and have to flash "ENG ROM" DONT FLASH ENG BOOTLOADER OR BASEBAND YOU WILL END UP UNKNOWN BASEBAND AND NULL IMEI.
Flash the rom from twrp and Also you have to flash supersu.zip to get full root with eng rom.
after that you have to use tool "Z3X SAMSUNG TOOLS PRO v27 or higher"
I cant share links here on xda for z3x because its heavily paid tool but if you search on youtube "z3x pro cracked" you will get 100s of videos with links to download.
HERE IS THE LINK FOR ENG ROM BY @freeza thanks to him.
https://forum.xda-developers.com/no...leakmm-sm-n910p-touchwiz-marshmallow-t3327350
After flashing eng rom the rom will take 35 minutes to boot so be patient and wait and also make sure battery is fully charged.
After that enable DM+MODEM+ADM as i mentioned earlier and you can unlock from z3x domestic use for american sim or unlock for international sim use.
Once phone is unlocked you must have to flash QI5 stock firmware via odin and do factory reset from stock recovery and dont worry the unlocking will stick permanently.
I personally did this method on QI5 ON my own device and it worked just fine.
I REPEAT DO NOT FLASH ENG BOOTLOADER OR MODEM OTHERWISE YOU WILL SCREW YOUR DEVICE COMPLETELY.
Cant explain more you got the idea i guess...
Good luck.

Trex888 said:
Yes DM+MODEM+ADM i was meaning.
The workaround i have is you have to flash Twrp RECOVERY and have to flash "ENG ROM" DONT FLASH ENG BOOTLOADER OR BASEBAND YOU WILL END UP UNKNOWN BASEBAND AND NULL IMEI.
Flash the rom from twrp and Also you have to flash supersu.zip to get full root with eng rom.
after that you have to use tool "Z3X SAMSUNG TOOLS PRO v27 or higher"
I cant share links here on xda for z3x because its heavily paid tool but if you search on youtube "z3x pro cracked" you will get 100s of videos with links to download.
HERE IS THE LINK FOR ENG ROM BY @freeza thanks to him.
https://forum.xda-developers.com/no...leakmm-sm-n910p-touchwiz-marshmallow-t3327350
After flashing eng rom the rom will take 35 minutes to boot so be patient and wait and also make sure battery is fully charged.
After that enable DM+MODEM+ADM as i mentioned earlier and you can unlock from z3x domestic use for american sim or unlock for international sim use.
Once phone is unlocked you must have to flash QI5 stock firmware via odin and do factory reset from stock recovery and dont worry the unlocking will stick permanently.
I personally did this method on QI5 ON my own device and it worked just fine.
I REPEAT DO NOT FLASH ENG BOOTLOADER OR MODEM OTHERWISE YOU WILL SCREW YOUR DEVICE COMPLETELY.
Cant explain more you got the idea i guess...
Good luck.
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The URL for the ROM is dead. Do you by any chance have alternate URL?

Aloupha said:
The URL for the ROM is dead. Do you by any chance have alternate URL?
Click to expand...
Click to collapse
Here
https://mega.nz/#!vQ9VDJIS!Gv85h3Y3K44ym9BlRvNvJEfkiXHfO__AbJHElZycUnY
Btw try first the cdma yemen tool to.unlock with this rom with root. Maybe it can work.

It appears that I am not able to install TWRP... I install it via Odin from AP, and the install is successful. But when I try to boot into recovery, I get the stock recovery....
I tried TWRP 3.1.1 and 3.2.3... same thing. What am I not doing?

Aloupha said:
It appears that I am not able to install TWRP... I install it via Odin from AP, and the install is successful. But when I try to boot into recovery, I get the stock recovery....
I tried TWRP 3.1.1 and 3.2.3... same thing. What am I not doing?
Click to expand...
Click to collapse
Open odin and uncheck auto reboot in odin options
Choose AP and flash twrp
After Odin shows pass remove battery
Insert battery and Boot straight into twrp by volume up+home+ power
If your phone reboots after flashing twrp the system overwrites the stock recovery over twrp thats why you are losing twrp so do not reboot system after flashing twrp.
Once you booted into twrp then if will stick permanently and stock recovery will never show up.
If i was helpful then consider hit thumbs up on my replies.

Thanks! It took a while with multiple flashes, but I think it is fully unlocked now. I am able to put a Verizon SIM card in it and get no sim card error message.

Aloupha said:
Thanks! It took a while with multiple flashes, but I think it is fully unlocked now. I am able to put a Verizon SIM card in it and get no sim card error message.
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Put sim card in phone then
Try dial ##72786# and press yes
Phone should reboot then you should get reception and.no sim massage won't show up.

Usure if anyone still using this. But I just got my phone unlocc using it on crikket/att. Unsure why you got a 7 wait but I was able to make phones and use internet immediately after I unlocc the phone. The only problem I'm facing is being able to use 4g o the phone.

Zaiaku said:
Usure if anyone still using this. But I just got my phone unlocc using it on crikket/att. Unsure why you got a 7 wait but I was able to make phones and use internet immediately after I unlocc the phone. The only problem I'm facing is being able to use 4g o the phone.
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Click to collapse
You won't get 4g/lte because n910p sprint note 4 is CDMA model and you need GSM model for 4g on at&t/cricket.