Develop Bugs

[Q] How do i unlock sprint samsung tab S ?

Hello,
As the title says, How do i unlock my Samsung tab S from Sprint so that i can use it on AT&T or internationally? I've searched all over google and this forum itself but i couldn't find a post that explains how. Is it possible to unlock this device by adb or other methods of unlocking such as editing the hex? Any help is very appreciated!
I'm sorry if this post is in the wrong sub forum or anything. I'm new here.
Best regards.

Possibilities
This is what I found out:
The chip in my Sprint Note 3 and Samsung Tab S 10.5 is similar and when compared the base bands were different. I unlocked my Note 3 using SSU. I tried the same on the Tab S it did say unlock but nothing happened when I installed a Local SIM ( Airtel )
The other thing I would like to point out is that SM-T807V, SM-T807R4 and SM-T807P all use the same chipsets i.e, Qualcomm Snapdragon 800, and one has the possibility to choose the GSM/Global-Mode on the SM-T807V( Verizon ) I am not aware of the U.S Cellular (i.e,SM-T807R4) though. If someone could shed some light on that.
So I would assume there are 2 ways to go ahead with this, one would either be to downgrade the baseband to that of the Note 3 then install Android 4.4.2 and then use SSU to unlock ( not to sure on this method just gave it a thought though ) and the other would be to flash the ROM on the SM-T807P with the Stock ROM of the SM-807V but then we are road blocked by the Kernal so possibly we might need to fabricate a new Kernal for this.
This is my first post on xda Hope what I said has helped. Do let me know if anyone has any development on this because I am stuck too.

Several issues with the plan.
You are unlikely to be able to flash the baseband from the Note3. There is no firmware available for the t807v and no source code.

How about the SM-T807R4 ? Can we use that ?

pixel.xo said:
How about the SM-T807R4 ? Can we use that ?
Click to expand...
Click to collapse
I'd be pretty sure the bootloader would reject it.

But doesn't the SM-T807P have an unlocked bootloader?

pixel.xo said:
But doesn't the SM-T807P have an unlocked bootloader?
Click to expand...
Click to collapse
It does, but the carrier versions seem to be more picky with what they'll flash.
The only way is to try it. Make a twrp backup then go for it.

why the the Exynos 5420 is so bad compare to the qualcomm snapdragon when it comes to optimization?

ashyx said:
It does, but the carrier versions seem to be more picky with what they'll flash.
The only way is to try it. Make a twrp backup then go for it.
Click to expand...
Click to collapse
Sorry, I am new to all that but i could give it a try. I'll let you know sometime in December the Tab has gone in for a service, the battery seems to have expanded and my top left screen has poped out and then the touch stopped working and my screen went all gibberish.
---------- Post added at 10:32 AM ---------- Previous post was at 10:25 AM ----------
xayan123 said:
Hello,
As the title says, How do i unlock my Samsung tab S from Sprint so that i can use it on AT&T or internationally? I've searched all over google and this forum itself but i couldn't find a post that explains how. Is it possible to unlock this device by adb or other methods of unlocking such as editing the hex? Any help is very appreciated!
I'm sorry if this post is in the wrong sub forum or anything. I'm new here.
Best regards.
Click to expand...
Click to collapse
Hey i had called sprint and all they told me was that this device isn't ment for global use and it only supports CDMA and LTE, and that was a shocker because the verizon one supports global use

Has anyone come up with an unlock for this yet ? I am stuck with a locked device ??

Canadian H812 Root

Hello Everyone,
Please forgive me if this topic is elsewhere, but I am hoping to get some assistance from the community. I have been searching for a method of obtaining root on my Canadian Bell LG G4 H812 running Marshmallow.
I saw a few methods before Marshmallow rolled out to Canadian Carriers involving extracting system image, injecting root, and replacing the system image on my device. I figured, when MM rolled out, there would be a better method found of doing this, but to my dismay, it now appears to be impossible on MM.
Can anyone confirm if root can be obtained on this device?
I am willing to downgrade to Lollipop to make this happen
Why is there little to no development for this model?
Is the model interchangeable with another LG G4 that root /unlocked bootloader has been found on?
Can anyone possibly offer a noob-friendly guide on doing this?
Please note, I am completely willing to downgrade to lollipop in order to make this happen as I rely on some apps that require root, and some that rooting makes the app more functionsl (Trimmer, greenify, xposed, Titanium Backup to name a few)
I have successfully rooted and unlocked many phones in the past (Motorola Milestone, HTC Desire Z, HTC Amaze, HTC Raider LTE /Vivid, Galaxy S2/3/4, Galaxy Note 2/3, LG G3) but for the first time in my rooting life, I not only feel completely unsure about the process, but I feel pretty uneasy. A lot of the guides that I found for injecting root into the system partition and re-flashing seemed incomplete or broken, and were not published on XDA, so I stayed clear of them.
Thanks everyone in advance.

If you find simple way to root H812 with android 6 let me know!

pace666 said:
If you find simple way to root H812 with android 6 let me know!
Click to expand...
Click to collapse
Not currently possible.

Eagle1337 said:
Not currently possible.
Click to expand...
Click to collapse
Hi thanks for the answer. I am just curious why it's not possible? I'd love to read a detailed explanation. I will never buy a device that locks me out to this degree. I am very upset with this. Thank you

905jay said:
Hi thanks for the answer. I am just curious why it's not possible? I'd love to read a detailed explanation. I will never buy a device that locks me out to this degree. I am very upset with this. Thank you
Click to expand...
Click to collapse
The exploit used has been fixed on mm

I will receive my G4 from Rogers in 2-3 days, what do you think will be on it? Lollipop or MM ?
Thank you
Daniel

could someone point to a forum, or provide some details as to why this is not possible?
will this be how all phones are made going forward?
I can't wrap my head around not being able to do this, and would just love some reading as to why it is not possible, and what to look out for when buying a new device that is not a Nexus.

Eagle1337 said:
The exploit used has been fixed on mm
Click to expand...
Click to collapse
could someone point to a forum, or provide some details as to why this is not possible?
will this be how all phones are made going forward?
I can't wrap my head around not being able to do this, and would just love some reading as to why it is not possible, and what to look out for when buying a new device that is not a Nexus.

The exploit used on Lolipop was by way of inserting the Su root binary and whatever other mods are needed into a system image and then writing it to the phones memory. This trick or exploit used to boot the phone into a state where you could write a new system image was fixed on Marshmallow. There is another trick that I see on the USA variant subforums for the G4 where you pull the USB cable out during an update exactly when it hits a certain percent to get the phone in the exact same state but it doesnt hepl with root anyway.
Marshmallow had changes to it which prevents rooting by simply changing the system partition (not sure exact details) which is why we have the systemless root now. Systemless root requires modifications that will not work with bootloader locked phones. No bootloader unlock has been made available for the G4 so not possible to root MM.
Check out the Canadian G4 thread in the general subforum.

My koodo h812 bought a few weeks ago came with marshmallow out of the box. Build date was July, sn607

If you want to root your new G4 you'll have to downgrade to LP. Check the Canadian H812 thread in the General forum for more details and use LG UP program to flash the KDZ. Mine came with MM from Rogers and it was pretty simple to downgrade.

I don't know how long I can resist the urge to root. My only real issue with it stock is the crappy battery life. There is no excuse for my old moto x with a way smaller, 2 year old battery lasting double the screen on time. I'll probably take the risk on the warranty because I'll always have a backup phone.

ReeS86 said:
If you want to root your new G4 you'll have to downgrade to LP. Check the Canadian H812 thread in the General forum for more details and use LG UP program to flash the KDZ. Mine came with MM from Rogers and it was pretty simple to downgrade.
Click to expand...
Click to collapse
do you mind sharing your step and the link to downgrade your canadian h812
thanks

ReeS86 said:
The exploit used on Lolipop was by way of inserting the Su root binary and whatever other mods are needed into a system image and then writing it to the phones memory. This trick or exploit used to boot the phone into a state where you could write a new system image was fixed on Marshmallow. There is another trick that I see on the USA variant subforums for the G4 where you pull the USB cable out during an update exactly when it hits a certain percent to get the phone in the exact same state but it doesnt hepl with root anyway.
Marshmallow had changes to it which prevents rooting by simply changing the system partition (not sure exact details) which is why we have the systemless root now. Systemless root requires modifications that will not work with bootloader locked phones. No bootloader unlock has been made available for the G4 so not possible to root MM.
Check out the Canadian G4 thread in the general subforum.
Click to expand...
Click to collapse
I was in this situation with my Canadian G4 (H812).. fortunately I traded it for the european H815 .... I made the right choice I feel. It's got unlocked bootloader, unlocked carrier, no service provider bloatware, and ALL the original LG apps running perfectly (including the FM radio and SmartWorld)
It's beautiful. Anyway there is a guy called SteadFasterX he is working on a custom bootloader called EFIdroid for LG G4 devices with the default bootloader locked. So we are bypassing LG's bootloader and giving control to the EFIdroid bootloader. He is also working on a project called TWRP-in-FISH which lets you boot anything using a LOCKED bootloader. So go check it out and pray, or trade it in for the european version.

I was one of steadfasterX's early testers for FIsH. Unfortunately I think most users are unable or unwilling to shell out more money to buy the exact same phone they already have with different software that is more open. I will just use my LG G4 as long as it suits me and then likely never buy another LG phone unless they change their policy on unlocking.
I'm happy that you resolved your issue but telling others to buy a new phone won't earn you any friends along the way. Plus with the G4 bootloop issues you'd be crazy to buy a used G4 unless it's a really good price.

You really should do your homework a little more thoroughly ...
BIG_BADASS said:
I was in this situation with my Canadian G4 (H812).. fortunately I traded it for the european H815 .... I made the right choice I feel. It's got unlocked bootloader, unlocked carrier, no service provider bloatware, and ALL the original LG apps running perfectly (including the FM radio and SmartWorld)
It's beautiful. Anyway there is a guy called SteadFasterX he is working on a custom bootloader called EFIdroid for LG G4 devices with the default bootloader locked. So we are bypassing LG's bootloader and giving control to the EFIdroid bootloader. He is also working on a project called TWRP-in-FISH which lets you boot anything using a LOCKED bootloader. So go check it out and pray, or trade it in for the european version.
Click to expand...
Click to collapse
You really should do your homework a little more thoroughly (LOL) ... TWRP-in-FisH does not allow you to boot just anything. It allows you to boot a custom TWRP version ONLY, a version that will work with locked bootloaders.
EFIdroid in FisH (an ALPHA stage project), if successful, may ultimately allow one to boot custom roms. It does not modify the stock bootloader partition, i.e. it does not unlock it, it hijacks the boot process.
FisH is the project that allows you to boot potentially anything.
You're not helping anyone providing inaccurate, misleading information. Your only contribution to date seems to be telling everyone to sell their H812's and buy H815's - you've made your point (over and over, ad nauseam - hint, look it up) ...
Cheers,
S.

Here you go ...
silent_eve said:
do you mind sharing your step and the link to downgrade your canadian h812
thanks
Click to expand...
Click to collapse
For all those H812 owners coming across this post now ...
Here you go ... [Canadian Guide] - Complete Source for the LG G4 H812. Linux VM/Root/Tools&Files @ https://forum.xda-developers.com/g4/general/canadian-guide-complete-source-lg-g4-t3212449
Do not use the root apps ... they won't work. Use the H81210 stock and rooted versions linked in the first post at the beginning of the Canadian guide site, they should work or you can search for both stock and rooted kdz's for your specific carrier. Use LGUP-NEW (https://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803) to downgrade and upgrade the firmware on your LG G4.
Follow the Root ANY LG G4 Variant 100% Success Directives | Root Injection | Less Bricks (https://forum.xda-developers.com/g4/...-root-t3180586) ONLY for installing the rooted image (assuming you have obtained a pre-rooted image, otherwise, follow all to root the stock LP kdz you have obtained) -- use the command for the H812 model in the 2nd post here: https://forum.xda-developers.com/g4/...ot-lg-t3164765 found in the following box: Command to Flash System.img (All Variants) for installing the rooted image.
That should cover it.
S.

silent_eve said:
do you mind sharing your step and the link to downgrade your canadian h812
thanks
Click to expand...
Click to collapse
Down here
https://forum.xda-developers.com/g4/general/tutorial-root-lg-g4-bell-virgin-t3470511

ReeS86 said:
I was one of steadfasterX's early testers for FIsH. Unfortunately I think most users are unable or unwilling to shell out more money to buy the exact same phone they already have with different software that is more open. I will just use my LG G4 as long as it suits me and then likely never buy another LG phone unless they change their policy on unlocking.
I'm happy that you resolved your issue but telling others to buy a new phone won't earn you any friends along the way. Plus with the G4 bootloop issues you'd be crazy to buy a used G4 unless it's a really good price.
Click to expand...
Click to collapse
I have never had a bootloop ever..
---------- Post added at 05:40 PM ---------- Previous post was at 05:38 PM ----------
My new goal: Install Windows 7 or 8 or 10 (Desktop version) on my LG G4
---------- Post added at 05:55 PM ---------- Previous post was at 05:40 PM ----------
http://www.androidinfotech.com/2016/04/root-lg-g4-60-marshmallow.html
Guys check this out... they found a way to root H812 running Android 6.0 marshmallow

Wrong ... again ...
BIG_BADASS said:
I have never had a bootloop ever..
---------- Post added at 05:40 PM ---------- Previous post was at 05:38 PM ----------
My new goal: Install Windows 7 or 8 or 10 (Desktop version) on my LG G4
---------- Post added at 05:55 PM ---------- Previous post was at 05:40 PM ----------
http://www.androidinfotech.com/2016/04/root-lg-g4-60-marshmallow.html
Wrong ... again ...
The information posted on the link you've referred to is factually incorrect. The method, using Chainfire's Supersu Beta version SuperSU v2.79 SR3 requires a modification of the boot partition. It is simply not possible with the locked bootloader of the H812, i.e., you can't believe everything you read. The author does somewhat qualify with the statement: If the Root is Not Working in Your Variant Should Be Unlocked Before Root.
You've owned your LG H815 for how long ... ? LOL ... less than a week? Tick, tick, tick ... ILAPO!
Cheers again,
S.
---------- Post added at 07:04 PM ---------- Previous post was at 06:35 PM ----------
silent_eve said:
Down here
https://forum.xda-developers.com/g4/general/tutorial-root-lg-g4-bell-virgin-t3470511
Click to expand...
Click to collapse
Look at the "Note" .... on post # 7 in the link you provided to your OP. If you're going to take information from another OP (even if to lay it out more succinctly in your own words), give the reference to the site and credit to the original poster from where you got most of it in the first place ... Spudnubs' guide dates back to September 2015. Your OP dates a full year after the original ...
S.
Click to expand...
Click to collapse

[LG-H81220U] I want to downgrade from MM to LP so that I can root my LG G4 (H81220U)

Hello, I want to downgrade my LG G4 (Software Version: H81220U) from Marshmallow to Lollipop so that I can root my phone. Could anybody guide me to achieve a downgrade AND a root? My carrier is Telus/Koodo in case it's relevant information.
Thank you in advance

syphlect said:
Hello, I want to downgrade my LG G4 (Software Version: H81220U) from Marshmallow to Lollipop so that I can root my phone. Could anybody guide me to achieve a downgrade AND a root? My carrier is Telus/Koodo in case it's relevant information.
Thank you in advance
Click to expand...
Click to collapse
first you need to nkow if tou can as in some models antirollback changes and makes it imposible to downgrade. so first make sure that antirollback versions they are if the same then you may if different then youll hard brick phone.

Hi @syphlect
Did you manage to downgrade it?
Have searched all the forums, did not find a way to root the LG G4 H1220u Koodo version.
let me know if you found any links

Use ...
Use ... LGUP - NEW ( https://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803 ) to downgrade from MM to LP. You want H81210 for your Lollipop KDZ. Once you've done that, you can install a pre-rooted image (easier) or root your own extracted KDZ. Note: You will not be able to obtain root through any of the Root-Apps - check out the link in the next paragraph for the general how-to for the H812, if you have not already done so.
Refer to [Canadian Guide] - Complete Source for the LG G4 H812. Linux VM/Root/Tools&Files at: https://forum.xda-developers.com/g4/general/canadian-guide-complete-source-lg-g4-t3212449 for the how-to on rooting the H812.
Follow the Root ANY LG G4 Variant 100% Success Directives | Root Injection | Less Bricks (https://forum.xda-developers.com/g4/general/lg-g4-100-root-success-directives-root-t3180586) ONLY for installing the rooted image and use the command for the H812 model in the 2nd post here: https://forum.xda-developers.com/g4/...ot-lg-t3164765 found in the following box: Command to Flash System.img (All Variants):
Once done, because you still will have a locked bootloader, you will not be able to install a regular version of a custom recovery or flash a custom rom (that may come eventually when efidroid is managed to be ported to the locked LG4's). However, you will be able to install a non-regular version of a custom recovery with TWRP-in-FisH that has been tested on the H812 and is working just fine with Version 3 Beta 4 and 5 (you can find those links in the later posts in that site): [LOCKED][G4][TWRP][UNOFFICIAL] TWRP-in-FIsH for all locked G4 devices at https://forum.xda-developers.com/g4/development/locked-twrpinfish-locked-g4-devices-t3573048
Good luck.
S.
NB: Don't forget to hit the Thanks button for those answering questions your questions and trying to help.
---------- Post added at 04:06 PM ---------- Previous post was at 03:52 PM ----------
phaninder.ch said:
Hi @syphlect
Did you manage to downgrade it?
Have searched all the forums, did not find a way to root the LG G4 H1220u Koodo version.
let me know if you found any links
Click to expand...
Click to collapse
See ... above ...
S.

Thanks a lot buddy... Will give it a try this week.
-Phani

See if you can ...
phaninder.ch said:
Thanks a lot buddy... Will give it a try this week.
-Phani
Click to expand...
Click to collapse
See if you can ... find KDZ's that that are particular to your region in the event there may be differences in bandwidths that are operational, etc.
Cheers,
S.

Yeah could not find specific to koodo Canada. Need to see if its safe to go with something similar to it.
Also I see my current software version is H81220Z. It got updated overnight even though I un-checked to install updates automatically.
Will the LGUP process still work to downgrade?

Koodo is on the ...
phaninder.ch said:
Yeah could not find specific to koodo Canada. Need to see if its safe to go with something similar to it.
Also I see my current software version is H81220Z. It got updated overnight even though I un-checked to install updates automatically.
Will the LGUP process still work to downgrade?
Click to expand...
Click to collapse
Koodo is on the ... Telus network. You can use Telus KDZ's (doesn't specifically have to be H81210Z and they seem to be available (check the Canadian Guide) - others have indicated you can use other Canadian providers (read the Canadian guide). I can't confirm this personally.
Use LGUP-NEW for sure as you are less likely to brick from what I understand if an anti-rollback provision has been put in on the latest firmware upgrade.
S.

Lg G7 firmware questions

well, thing is my device has a firmware from a carrier form mexico and i wanted to change it to get rid of those MANY apps it comes with. however, i ended up with some questions, i want a version that can give me OTA updates as they come out (this carrier takes a lot of time to realease updates) so as far as i could find the lm-g710em10b was a good option, but my model is a lm-g710awm, so...
1._ can i flash the g710em10b kdz on my g710awm model without having to worry about something in specific?
2._ Is that kdz version a good one or do you recomend another one for me?
3._ as far i know i do not need to unlock my bootloader to change my firmware, am i wrong?
hope you can help me, and thanks in advance hehe

Flashing generic Samsung firmware to carrier branded Tab S4 (SM-T837T -> SM-T835)

I think this has been asked before in a different way in this section but no real response yet. I did some research in the other Samsung device forums and see that often it is possible to remove branding or switch carriers adjusting device ID and bootloader etc. But no idea how to do it for the Tab S4.
I'm sick of waiting for slow updates through T-Mobile (or any carrier) and would like to fully unlock it's potential with Android 10 rather sooner than later. I bought this device second hand network unlocked.
Any short or long answer to these questions? Can it be done? If so where to start?

Am looking to do so, with the t835 you will have full calling functionality,,,
Cidious said:
I think this has been asked before in a different way in this section but no real response yet. I did some research in the other Samsung device forums and see that often it is possible to remove branding or switch carriers adjusting device ID and bootloader etc. But no idea how to do it for the Tab S4.
I'm sick of waiting for slow updates through T-Mobile (or any carrier) and would like to fully unlock it's potential with Android 10 rather sooner than later. I bought this device second hand network unlocked.
Any short or long answer to these questions? Can it be done? If so where to start?
Click to expand...
Click to collapse

Ramiyounan said:
Am looking to do so, with the t835 you will have full calling functionality,,,
Click to expand...
Click to collapse
not needing the calling function on a tablet. but steady updates are welcome... tired of waiting twice.. first for Samsung with slow update policies then another time for carriers that already got their money and cant care much a anymore...
i'd be looking for T835C since I'm in China now.

Cidious said:
Any short or long answer to these questions?
Click to expand...
Click to collapse
The short answer is no.
I've tried that after I found my T837V can be successfully loaded with T837R4/T837T/... firmware. I thought maybe I could flash stock firmware of other versions. But if you do that with any firmware other than T837*, you will get "secure check fail pit" error. So sadly no.

ivesun said:
The short answer is no.
I've tried that after I found my T837V can be successfully loaded with T837R4/T837T/... firmware. I thought maybe I could flash stock firmware of other versions. But if you do that with any firmware other than T837*, you will get "secure check fail pit" error. So sadly no.
Click to expand...
Click to collapse
Thanks for the response! So it does mean you can freely flash T837 versions which could mean I can just wait for the first version that comes out with android 10. Any first release should work. Right?
Turkey version has it:
https://www.sammobile.com/samsung/galaxy-tab-s4/firmware/#SM-T837

Cidious said:
freely flash T837 versions [/url]
Click to expand...
Click to collapse
T837 is Turkey version and I've tried it. It can't be loaded, maybe it need to be T837x which are all US variants.
As for Android 10 update, I think this will work. I'm waiting for the first one who gives the OneUI 2.1 update. So far the Verizon version(T837V) seems to have the most active firmware updates.

In the USA, SM-T837 ARE carrier tablets.
There are the SM-T837A, V, and T; ATT, Verizon, T-Mobile. TheSe are locked to the Carrier. If you have them unlock it, OTA upgrades are over. If you know how to hack the firmware, you can write over the carrier version. The best way to go is probably custom ROM AND ROOTING. But in other nations, it will probably work to write a different Samsung ROM. The SM-T835 HAS no US version, so you can probably write any tab s4 Factory ROM to it.
The USA HAS so many cellular devices, the rules are strict. And, the carriers sell the devices pretty cheap. So, they want them to stay with their service.

T-mobile update for android 10 finally out just got it