Database Users

at&t blocks me from custom recovery

HI Everybody,
Ok so my problem is that I can't access my custom recovery on my s4 SGH-I337.
My s4 is running android 4.2.2. It has root access and the bootloader is unlocked. I installed clockwork mod recovery touch 6.0.4.7 jflteatt using the app Rashr. When I try booting into clockwork I get blocked. It says "system software not authorized by at&t has been found on your phone." And then tells me to turn off my phone and go to the nearest at&t store. Also at the top left corner it has : ( Secure Failed:Kernel ) in red.
Sorry if there's a thread already about this but I couldn't find anything using the search engine. Thanks

There has never been a boot loader unlock for the sgh-i337. There was only a workaround - Loki. That too worked only for the MDB/MDL firmware. If you have MF3 or newer, boot loader is locked. So, no custom recovery and kernel. The only working recovery is safestrap.

Hi jmjoyas,
Thanks for replying! After reading your reply I finally understand what's up with at&t's s4. (I official dislike at&t even though their service is dependable) I was really looking forward towards cyanogenmod :crying:! But I still have some hope that my bootloader is unlock. This get's really complicated but when I first got my s4 it was came pre rooted and I believe it was refurbished in Asia. Weird right, but my phone dealer was chinese so who knows. Anyway so when I had Rashr boot into recovery I came across a loading screen with a samsung in print and under it was the word custom and under that work was a picture of a lock unlock! I believe that lock sign is the bootloader based on my rooting experience on my mom's galaxy nexus. I have a picture of that loading screen, but I can't upload it! Is there another way to show it?

b..c said:
Hi jmjoyas,
Thanks for replying! After reading your reply I finally understand what's up with at&t's s4. (I official dislike at&t even though their service is dependable) I was really looking forward towards cyanogenmod :crying:! But I still have some hope that my bootloader is unlock. This get's really complicated but when I first got my s4 it was came pre rooted and I believe it was refurbished in Asia. Weird right, but my phone dealer was chinese so who knows. Anyway so when I had Rashr boot into recovery I came across a loading screen with a samsung in print and under it was the word custom and under that work was a picture of a lock unlock! I believe that lock sign is the bootloader based on my rooting experience on my mom's galaxy nexus. I have a picture of that loading screen, but I can't upload it! Is there another way to show it?
Click to expand...
Click to collapse
As far as I know bootloader is locked for all AT&T S4 firmwares. So far we have a bootloader exploit call "Loki" only for the MDB/MDL firmware. There is no bootloader exploit for MF3, MK2, NB1, NC1 firmwares out yet.
You would see the "custom" word and unlock lock in every rooted AT&T S4. It has nothing to do with bootloader lock or unlock. If you unrooted (uninstall the superuser) your phone that symbol would go away.
Could you please tell us your phone firmware (baseband, build number, etc.) so that we can help you more.

Study up by reading thru General threads. Several to get you up to speed on upgrading and SafeStrap. There is one GPE rom that will run on your phone. AOSP based. It is General alos. But, read that thread carefully. There are very specific flashing/upgrading instructions and some bugs. I would probably get familiar with TW roms on SafeStrap first--:good:

Hi sway and rugmankc,
Thanks for giving me a better insight on my situation. Sway you're correct. When I boot into recovery after I un installed super su that loading screen was gone. Case solved! And rugmankc I'll look into general alos. Thanks guys for all your help including jmjoyas!:fingers-crossed: Thanks again!

And I forgot to answer your question sway. I have MF3 . Hopefully there's will be a bootloader exploit but until then I'll keep my fingers crossed:fingers-crossed:!

b..c said:
And I forgot to answer your question sway. I have MF3 . Hopefully there's will be a bootloader exploit but until then I'll keep my fingers crossed:fingers-crossed:!
Click to expand...
Click to collapse
I don't need SafeStrap, so not up on it. I believe process would be upgrade to NC1, root with Towelroot, and use SafeStrap. But, check all that out before doing. May be steps in between. Make backups before and after as best you can.

[Q] Recent Bootloader Unlock and root access guides

Hello everyone, I'm a brand new member with a couple questions.
I have read many threads here and elsewhere and have recently found two possible sources of information to help me finally unlock my boot loader > backup nandroid > flash cyanogenmod. Profit.
My Droid Razr M has root access. System Version: 98.18.94.XT907.Verizon.en.US / Android JB 4.1.2 / Build Number 9.8.1Q-94
Wen I started, I got used to the idea of staying with JB 4.1.2. It has worked well over the year. And having root and Titanium Backup has given me great power over my phone.
I would like to ask if it is possible to both root and unlock the newer KK 4.4.2 using the these methods I have found and my phone.
First PrankCallPimp youtube guide states I need to flash from JB 4.1.2 to Verizon stock KK 4.4.2 using RSDLite
Second Mr. Blue Coat provides a better stepwise guide outlining root access and unlock procedures, but starting with KK 4.4.2. Very Complete Blog.
I have assembled all of the files these sources suggest to have on hand during the project.
Additional questions. Is PrankCallPimp's method to flash to KK 4.4.2 using VZW_XT907_4.4.2-KDA20.62-10.1_CFC_1FF.xml files in RSDLite correct? His video cuts out after a while. After flashing KK 4.4.2 the phone will be similar to a factory reset and be susceptible to OTA updates. Currently I use Voodoo OTA to prevent updates. Should I reinstall Voodoo OTA to prevent Verizon pushed updates or go from there to root access and boot loader unlock procedures?
I have never liked following a youtube guide and wonder if there is a printed version I could review before starting. Also I installed RSDLite and my phone can be detected by the program.
I think if Mr. Blue Coats guide is acceptable to everyone, I could follow it with no problems.
What I'm worried about is giving up my currently profitable root access on JB 4.1.2 to go to KK 4.4.2.
It seems that if I really want an unlocked boot loader, I must take KK 4.4.2
If these two guides work, with someone's help, I would be happy to join them into a single clear guide to post here.
I lack the experience most of you have so I'm reaching out with these questions before I even consider going through with this.
Thanks All. Ps. I'm in no hurry.

Read this thoroughly

Thank You
Thank you for the ultrafast help!
There was my answer: 4. RESTORING / UPGRADING STOCK FIRMWARE.
And all the additional tools required for root access and boot loader unlock.

I have a question
Hello!! I am trying to unlock my botloader in the same phone as yours!
98.19.94.XT907.Verizon.en.US
4.1.2
9.8.1Q-94
How did you do that? I am asking because i tried the motopocalypse and all the stuff on this forum but i didn't managed to unlock the bootloader!!
Thank you in advance!!
P.S. The phone is rooted

SerDavran said:
Hello!! I am trying to unlock my botloader in the same phone as yours!
98.19.94.XT907.Verizon.en.US
4.1.2
9.8.1Q-94
How did you do that? I am asking because i tried the motopocalypse and all the stuff on this forum but i didn't managed to unlock the bootloader!!
Thank you in advance!!
P.S. The phone is rooted
Click to expand...
Click to collapse
Read the first post here:
http://forum.xda-developers.com/showthread.php?p=55282645
Everything you need to know is there...

Thank you!!
You are the man!!
I made it! I am running cm12.1, 5.1.1.!
I had to update with RDS to KitKat bootloader and then follow the instructions!! :good::good::good::good::good::good::good:

SerDavran said:
You are the man!!
I made it! I am running cm12.1, 5.1.1.!
I had to update with RDS to KitKat bootloader and then follow the instructions!! :good::good::good::good::good::good::good:
Click to expand...
Click to collapse
I'm failed to unlock bootloader of XT907

Dont worry!!
arslanazizsoomro said:
I'm failed to unlock bootloader of XT907
Click to expand...
Click to collapse
Do this steps:
1) Download KitKat stock rom. Link below.
2) Flash stock rom from windows with RSD lite tool. Follow this tutorial to download and flash stock rom. LINK
Steps that worked for me in this tutorial
3) 2. BOOTLOADER UNLOCKING wih APK.
Good luck!!

Has anyone been able to ROOT their SM-n910v Marshmallow 6.0.1?

Build MMB29K. I've tried and can't get TWRP loaded on there. I just bought this phone, but thinking about sending it back and keeping my rooted Note 3 if I can't get this to root! Here is the partial link to my post on Reddit about this same topic:
galaxynote4/comments/52my2m/has_anyone_been_able_to_root_their_smn910v/
Still no solution. Please help!

Same here
Can't get Odin to write the bootloader successfully.

mrcomedicgenius said:
Build MMB29K. I've tried and can't get TWRP loaded on there. I just bought this phone, but thinking about sending it back and keeping my rooted Note 3 if I can't get this to root! Here is the partial link to my post on Reddit about this same topic:
galaxynote4/comments/52my2m/has_anyone_been_able_to_root_their_smn910v/
Still no solution. Please help!
Click to expand...
Click to collapse
Right if u took the ota you are locked as far the bootloader goes ....flashing will not be possible til this is corrected ....im told u can odin back to 5.1.1 which has a pretty easy method the safely upgrade so rooting and unlock are simplified. I never tried to rooting from the stock firmware.... does kingroot ever get u rooted? If so the u could try the aforementioned method but u would need a 6.0.1 compatible kernel (Sprint) given u r on there dev cid .

in the verizon note 4 form is where you should be looking because you have a locked bootloader.

Updating stock

Hello guys, I had my phone rooted a while ago (HTC ONE M8, international version or say INDIAN version) and was running on custom roms. Then came the Marshmallow update so I unrooted and all no RUU was available for Android M so I flashed Android L and updated OTA. And then again i had so many apps and god knows what and I wanted a fresh slate as everything was slowing it down very much and somehow I flashed the zip file using the sdcard method. And now the system is taking a good 7-8 GB of the internal 16GB. Right now the phone is RELOCKED, STOCK RECOVERY, UNROOTED. Just think of it as in a default condition. Now I have "0P6BIMG_M8_UHL_M60_SENSE70_MR_hTC_Asia_India_6.15. 720.2_Radio_1.29.214500021.12G_20.72.4196t.01_F_re lease_469495_signed" This RUU.zip. I WANT TO WIPE EVERYTHING PREVIOUSLY ON THE PHONE, LITERALLY EVERYTHING, AND THEN INSTALL THIS RUU SO THAT IT USES THE MINIMUM POSSIBLE SYSTEM SPACE. How to do that? I do not need a detailed guide just give me the step-wise information as in flash TWRP first then do this, then do that, you know what I am saying. Please help me out here it would be a lot of help, I can not see this great a device lagging doing the normal stuff. THANK YOU :fingers-crossed:

Stick to one thread, and please stop posting the same thing over and over (you've now copy/pasted the exact same post 3 times). I've provided some guidance in to the other thread you posted in.
"General" is also not the right place to ask for this kind of help.

thread closed, the answer you seek is here:
https://forum.xda-developers.com/showpost.php?p=72059247&postcount=68

Samsung Galaxy S8 - BOOTLOADER

hi.
can anybody please tell me how can i downgrade the bootloader of my galaxy s8? its been updated and since then i cannot install android 7.0, i only can use 8.0.0 which i don't really like it.
i want to downgrade the bootloader and install 7.0, or, if this is not possible i just want to reinstall the current bootloader, i think it has some problems. i tried to downgrade it once (not knowing if it possible or not) and i got a fail message in odin. i'm that type who doesn't like errors at all and i just want to reinstall the bootloader corectly. thx
p.s1: sorry for the category of this post, but i'm new on forum, just made the account so it wont let me post anywhere else...
p.s2: sorry for my english, it ain't that good.

teo.tda18 said:
hi.
can anybody please tell me how can i downgrade the bootloader of my galaxy s8? its been updated and since then i cannot install android 7.0, i only can use 8.0.0 which i don't really like it.
i want to downgrade the bootloader and install 7.0, or, if this is not possible i just want to reinstall the current bootloader, i think it has some problems. i tried to downgrade it once (not knowing if it possible or not) and i got a fail message in odin. i'm that type who doesn't like errors at all and i just want to reinstall the bootloader corectly. thx
p.s1: sorry for the category of this post, but i'm new on forum, just made the account so it wont let me post anywhere else...
p.s2: sorry for my english, it ain't that good.
Click to expand...
Click to collapse
you want to go back to nougat from oreo , am i right ? Then try this video, if it doesnt help please reply to me and i am gonna find a solution to you ASAP
1) https://www.youtube.com/watch?v=qqpucWXyfqY

hi. thx, but i did this right (like in the video) many times, and it worked perfectly. now is not working cuz the bootloader was updated, and it won't let me downgrade the firmware anymore. i am still trying to find a way but i don't know if is possible.
i am searching a way to downgrade bootloader and then downgrade the firmware, but i dunno if is possible to downgrade bootloader once it was updated.

i am looking for the same solution. i managed to downgrade to Nougat but cant install custom rom

Can someone help me? I have G950FD which Firmware should I flash for my phone? I am using this model in the US

So no solution to downgrade bootloader version?

Bootloader downgrade for U6 is not available yet (For free)
rilley said:
So no solution to downgrade bootloader version?
Click to expand...
Click to collapse
I have searched the whole web. but, I haven't find the solution to downgrade the bootloader for Binary 6. Well, my phone's OS is dead after upgrading to pie. So, apparently the only way for me and to others who are facing the similar issue is to wait until someone releases Binary 6 combination firmware for SM-G950FD.
Good news: It's easy to get your phone running if your bootloader is not upgraded to binary 6. Cuz, Binary 5 firmwares and combination files are available out there and they are 100% working unless your MB is dead.
Note: I have flashed following stock firmwares successfully through ODIN [INS-G950FXXU6DSK9-20191231094010 and INS-G950FXXS6DTA1-20200120123810] yet no luck. Can't boot the OS. Tried to root the phone, cant able to flash the custom recovery. Nothing just works.
Someone, please tag me if ever finds U6 combination file. That's the only hope to bring back my phone to life.