Cannot unlock AT&T Samsung Galaxy S4 Model SGH-I337 - Android Q&A, Help & Troubleshooting

After following the instructions below, I can get to Step 3 but there is no option for [1] UMTS. See attachment. Any help will be appreciated.
After samsung blocked the hidden service menu unlock for s4 i am bit worried .but today i found out new process to unlock for free in a website [/B]
Step 1: Launch the Phone app on your Galaxy S4, and dial in: *#0011#
Step 2: Press the Menu button followed by the Back key. Then, hit the Menu button again and select KEY INPUT. Enter 1 and press the OK button to enter ServiceMode.
Step 3: Press Menu one more time and tap back again. This will pull up the Main Menu for ServiceMode. Tap [1] UMTS.
Step 4: Now select [1]DEBUG SCREEN, followed by [6] PHONE CONTROL.
Step 5: From the next screen, pick [6] NETWORK LOCK.
Step 6: You’ll get three options. Hit the one that says [3] PERSO SHA256 OFF.
Step 7: Now, you need to get back to Main Menu. To do this, hit the Menu button followed by the Back key. In Main Menu, now pick [6]COMMON, and then [6] NV REBUILD.
Step 8: The phone will tell you that a Golden Backup exists. Tap [4] Restore Back-up.
Your device will now go through a series of “conditions”, where it will first freeze, then get on a black screen with Blue LED on and both capacitive buttons on, after which it will reboot automatically. The whole cycle might take a couple of minutes, so be patient. Once it powers back on, it’s network unlocked, permanently. Enjoy Folks ...

Related

Hard Reset

Worked on my Lobster which was hanging on windows startup screen.
WITH PHONE SWITCHED OFF
1. Press and hold soft1 and soft2 keys (i.e. menu keys).
2. Press and hold power button for around 1 to 1.5 seconds. Release power button. Keep holding both soft keys.
3. After a while, black screen should show instructions asking user to press '0' key to reset to factory default.
4. Press '0' within the timeout period (which is very brief).
5. If instructions don't appear on the screen, repeat steps 1 to 4.

Native Padfone X Recovery Mode

After tinkering around with the developer settings i came to the conclusion that this device soft bricks when you experiment with the ART compiler, lets just say enabling it will keep you at the boot screen. I used this method on other Padfone Variants and it works on the Padfone X
If you are on the ATT boot screen and nothing is going on dont catch a heart attack
1) Hold the Volume - button on the side of the device and hold power till the phone reboots, keep holding the Vol -
2) You will be greeted with a prompt to enter or exit recovery, of course choose the enter recovery selection with the volume keys and hit power to enter
3) You are greeted with a selection screen anything from installing firmware from the phone or external sd and of course the ability to Wipe / Factory reset
4) Navigate with the vol - key to highlight Wipe / Factory Reset and hit the power key to enter, then on the next selection screen navigate down to perform the action
process takes about 4 minutes tops, afterwords the screen will pop back into the main selection screen, choose reboot phone and wait. As with all first boots this will take about 5 minutes tops, hence the ATT Logo will be visible, you will then jump into the get started screen as you did when you first bought the device.
Hope this helps with those experiencing problems
Try not to remove any bloat/or features if there is no official firmware recovery, you run a huge risk in perma-bricking your device if not careful. Wait for the DEVs to swarm in and serenade us with features
And BTW...stay away from selecting the ART compiler if youre going to enable developer mode, Stick with Dalvik if you dont want to get stuck.

Solution of Gear S (AT&T model) Bootloop

1.- Wait until the device turns off.
2.- Plug the device on the base and when the screens shows the battery logo, unlink the device form the base and immediately press and hold the power button.
3.- When the ''rebooting'' screen apears, relase and press twice the button again to enter the menu.
4.- Go down to the options and select download (1 Click: go down, 2 Clicks select).
5.- Conect the device to the computer, open odin, and flash the tizen rom. (E-mail me for the link).
6.- Wait until the process finish and never try to flash another thing to your watch.
Hope you can revive the watch .
Help:
[email protected]

Help! Huawei Y536A1 phone stays on the logo "android"! Thanks.

My cell phone model is Huawei Y536A1. It suddenly turned on by itself for several times and then finally my phone screen just stayed on the "android". I tried several ways to deal with the problem, but sill could not work.
I tried ...
1. Alternate Master Reset Method: a) press and hold the Volume Up and the Power key for 8 seconds, then release b) Press the Volume down key until "wipe data/factory reset" is highlighted c) Press the Power key to select > Press the Volume down key until "Yes -- delete all user data" is highlighted d) Press the Power key to select e) Once data has been wiped, a green "OK!" with a checkmark will be displayed f) With "reboot system now" highlighted, press the Power key to select.
--> it did not work for my phone.
2. I also tried "wipe cache partition". It still did not work. It went back to the logo "android" again.
3. I went to AT&T store. They could not help because of out of the warranty. A staff even did not want to try. It's very frustrating. Later, I asked them to change my sim card to my traditional old AT&T phone. So, my Huawei Y536A1 is no sim card now. However, i still want to use it if it can work.
After I took out of the sim card, my phone screen will stay a global sign for a while and then turn of by itself. ><
I would very appreciate if anyone could give me possible suggestions to fix that problem.
Thank you.

[Guide] Samsung M30 Recovery (TWRP) and Root (Magisk) - Detailed Redux

Summary - After two weeks of research (mostly on XDA) I took the risk and decided to root my new Samsung M30. Suffice to say I was extremely apprehensive given numerous reports of bootloops, recurring seven day OEM device locks, crashes, hangs and general instability. After following specific steps that combine several sources, I successfully rooted my device. Moreover, key root applications are all working well (AFWall+ Firewall, AdAway, Root Explorer)! This guide shows what I did.
Credits to Sahir_Sonar (most of the work are the fruits of his labours)
Sahir_Sonar YouTube Guide
Sahir_Sonar TWRP thread
Downloads
RMM_Bypass_v3_corsicanu.zip (attached)
no-verity-opt-encrypt-6.1.zip (attached)
Magisk-v20.0.zip (attached)
Copy these three files (above) to phone's external SD card.
Odin3 v3.13.1 (or later)
recovery.tar (TWRP 3.3.1 for Galaxy M30) Download here
MagiskManager-v7.3.5.apk (via Google Play later)
Unlock Bootloader
Ensure you are using the correct device and OS version for your Samsung M30.
From Settings, tap About phone then Software information.
One UI Core 1.1
Android verion 9 (aka Pie)
If you have Android version 10 (aka Q), you need to downgrade the OS, which is beyond the scope of this thread. Essentially, you have to download your specific ROM (that matches your country and baseband) and use Odin3 to flash it.
Enable Developer Options.
From Settings, tap About phone then Software information .
Tap Build Number seven times. Developer Options should now be visible from Settings
From Settings, tap Developer Options
Check (enable) OEM Unlocking.
You are prompted and warned about a Factory reset. It is assumed you have no important data on the phone (or have made an appropriate backup on external SD card). Accept data erasure. Phone will reboot on its own.
Power up phone. It is like new and needs setup from scratch. After your usual setup steps ....
From Settings, tap Developer Options
Check (enable) USB debugging.
Check (enable) OEM Unlocking.
Power off your phone. Press side power button then select Power off twice when presented. Do not wander or tap on other functions of your phone; power off immediately. This is critical to unlocking the bootloader.
If option for OEM Unlocking is not present, your phone is locked. Here are several options to try.
From Settings, tap Software Update the tap Download and install.
Wait till phone complains and rejects your command due to unauthorized modification.
From Settings, tap Developer Options and check if OEM Unlocking is present. If so, check (enable) it then immediately power off as described above.
Flash TWRP and Root
From your PC, extract Odin. Navigate to its folder.
Right click executable and select 'Run as administrator'.
From Odin, click Options tab and uncheck 'Auto Reboot' option.
From Odin, click AP button. Navigate to where to saved the recovery.tar file.
From Odin's dialog box, select recovery.tar file then click Open button.
Power up phone in stock recovery mode.
With phone off, simultaneously press Volume Up and Power button until Samsung logo appears.
From phone's stock recovery mode.
Use Volume Down button to highlight 'Reboot to bootloader '.
Press power button. You are now in download mode.
Connect Type-C USB cable to phone and PC.
Odin will acknowledge connection with 'ID:COM' update and will be highlighted.
From Odin, click Start button and wait for SUCCESS indicator.
Disconnect USB cable.
Reboot phone into TWRP. This is critical and the trickiest part of all.
From phone, press Volume Down + Power button until it blacks out.
Immediate press Volume Up + Power button until TWRP appears.
From TWRP, "Swipe to Allow Modifications'.
From TWRP, tap Home key (on phone) for TWRP main menu.
Tap Wipe button.
Tap Format Data. Then, type 'yes' for data format. Tap 'enter' keyboard button.
Wait till 'Data Format Complete'.
From TWRP, tap Home key (on phone) for TWRP main menu.
Tap Mount button.
Ensure that System, data, cache and Micro SD card are mounted.
From TWRP, tap Home key (on phone) for TWRP main menu.
Tap Reboot button.
Tap Recovery button.
Swipe to 'Install TWRP App'. TWRP rebbots itself.
From TWRP, tap Home key (on phone) for TWRP main menu.
Tap Mount button.
Ensure that System, data, cache and Micro SD card are mounted.
Tap Select Storage button.
Tap Micro SD card. Tap OK.
From TWRP, tap Home key (on phone) for TWRP main menu.
Tap Install button.
Select RMM_Bypass_v3_corsicanu.zip.
Swipe to confirm Flash.
From TWRP, tap Home key (on phone) for TWRP main menu.
Tap Install button.
Select no-verity-opt-encrypt-6.1.zip.
Swipe to confirm Flash. Disregard error message if any.
From TWRP, tap Home key (on phone) for TWRP main menu.
Tap Install button.
Select Magisk-v20.0.zip.
Swipe to confirm Flash.
From TWRP, tap Home key (on phone) for TWRP main menu.
Tap Reboot button.
Tap System button.
The System reboot can take a few minutes and may seem like an eternity. Just be patient. The phone will again be like new and you will have to setup everything from scratch. Later, install Magisk Manager from Google Play.
Enjoy :angel:
Thanks dude this work for me
@xdafan666 I am sure, this is for Android 9, and not 10, right?
Can you please help me in downgrading from Q to Pie.
zer0C00L...... said:
Can you please help me in downgrading from Q to Pie.
Click to expand...
Click to collapse
Watch this video the trick to downgrade Q to Pie https://youtu.be/wdtt0e6Ey90
M30s
This root guide work on M30s?

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