Cannot unlock with unlock code given by AT&T - Samsung Galaxy S7 Active Questions & Answers

I got an unlock code from AT&T for my Active. The instruction they send me is this:
1. Power off the device and remove the SIM card.
2. Power on the device.
3. Enter #0111*, the unlock code, and #. The device cycles off and back on.
However after step 3, nothing happens. I tried a couple times, press the dial button, nothing happened.
Can anyone help? Thanks

Put your AT&T SIM card back in the device, power it on, then make sure it's working with AT&T - this is assuming you have AT&T service, I hope, 'cause if not you could be somewhat stuck here.
Having said that, the process is fairly simple:
- power down the device with the AT&T SIM card inside it (as noted above, if this can't be done then again you could be stuck)
- take the AT&T SIM card out, put in a SIM card from whatever provider you're attempting to use the device with
- power on the device
- after the boot process is finished you should encounter this screen or something similar:
With a non-AT&T SIM card in the locked device that screen should appear every time you boot the device until you actually get it unlocked, if you're not seeing that screen then something odd is happening.
- if you do see that screen enter the code and BE VERY CAREFUL NOT TO MAKE ANY MISTAKES WHATSOEVER because you can only enter a code incorrectly a certain number of times after which the device will never be unlockable so, make sure you're accurate.
My Active is still network locked and I just put a T-Mobile nanoSIM in it, rebooted and voila, I get that screen. If you're not getting it then something is not right someplace, you might need to go to an actual AT&T store and see about having them assist you.

Related

Did I just erase my Softbank USIM card?

finally, imei-check has added x01ht to their list. now, you can unlock network and career lock with them. this means you can use other careers' SIM and burn any ROM you want.
http://www.imei-check.co.uk/m3100unlock.php​
Hi, I justed used the imei-check to unlock my newly purchased Softbank X01HT. The unlock seemed to go just fine, but now when I a short while after reboot I get a blank screen in japanese that says something about my USIM card, with a blank field for entering something (maybe a code?)
Otherwise the phone is disabled.
Did I just screw up my USIM card? I did the unlock with the SIM card installed -- was that wrong?
m.
nevermind
did a hard reset and it seems to fix the problem. sorry about the confusion.
i seem to be stuck here now and hardresetting only delays how long it takes before that screen comes back

Sim Card Locked on LG p500h

So I recently tried to root my phone but failed and had to factory reset. Afterwards, the phone kept saying no service on bootup. Then after 15 minutes, it connects with Telus and I have service again, but seriously..15 minutes?
I found out it's because the sim card locks up everytime the phone restarts. I could easily unlock it by going to settings > location > change sim state, but it says I have "0 attempts remaining" so im pretty screwed over.
As far as I know, it should at least prompt you for the pin during startup, but I don't get that either.
it's not a big deal cause I never shut my phone off but its only a week old so yeah, don't want a buggy device
*******BUMP*

I747 - Stock room 4.4.2 - How to unlock with paid code ?

Baseband/modem I747UCUFNJ2, stock 4.4.2 rooted. Phone from AT&T working ok with Claro Brazil (code unlocked) . After upgrading, lost IMEI. Flashed new modem and IMEI and IMEISV ok now. Checked IMEI number, is the same printed behind battery on phone. But now can not make calls. Got message 'No SIM card'. Ordered a Sim card tray, replaced it, but got same message. Phone has strong carrier signal. After reading a lot, I ordered a paid unlock code, but seller stated that code doesnt work in android 4.2.2. Even though, I tried to insert it once. (#@7465625*638*# - have to use it since phone doesnt ask for code at starting). As stated by seller, got message 'unlocked unsucessfull'. So now, what can I do to unlock the fone ? I have access to a hiden menu by dialing *#197328640# , but dont know how to use it. I have read a lot during this week. Did no find any helpfull information. Any help will be apreciated. Sorry for my bad english.
Sounds like the baseband and bootloader and too new for the ROM. You probably need to upgrade from stock 4.2.2 to stock 4.4.2 or flash a custom ROM based on a TW-kernel.
I edited/corrected my wrong information. The phone is on 4.4.2 stock already.
Try this:
Method 1:
Go to the dial screen and press #7465625*638*#
Once prompted for code, enter 8 digit Unlock Code.
Method 2:
Turn off your Samsung phone
Insert a non-accepted sim card (different from the original carrier) and turn your phone back on.
When prompted for the unlock code type the UNFREEZE code provided. If you are not prompted, go to your dial screen and type the UNFREEZE code, now press enter, send or call. You will receive an unsuccesfull message, don't worry.
Once the phone freeze is disabled, the Network lock or SP Lock screen will appear
For Network lock enter the UNLOCK code provided. For SP Lock enter the SERVICE PROVIDER code
Your phone is now fully unlocked!
If you get "unsuccessful" again then hit Dismiss button and type *2767*3855# on phone keypad and try this procedure again (CAUTION! This will reformat all your data!).
Method 3:
You can try this method without the sim card or with the original sim card
Type #7465625*638*CODE# (CODE is the Unlock Code)
Phone deactivated message means its unlocked

How to carrier unlock SGH-i317

After having a great deal of trouble getting my phone unlocked I've decided to post a short how-to in the hopes that I'll save some people from the same aggravation.
This was on stock Samsung ROM, and of course your IMEI must be clean. You will also need an active SIM card from another GSM carrier that can do LTE/4G.
First, go to the AT&T Device Unlock Portal and go through the steps. I didn't enter my real name. It's an automated system that will email you the unlock code.
You should get an email from AT&T fairly soon. It will have a link to check the status. Follow the link and if the status is complete you'll be shown the unlock code for your phone. Write it down if you're viewing this from the phone.
Shutdown your phone, open it up, remove the battery, and AT&T SIM. Put non-AT&T SIM in, replace battery and close it up.
Boot your phone and you should be prompted to enter the unlock code.
If the code works, then it will take you to the home screen and in the status bar it should not say there's an invalid SIM.
If the code does not work, then hit dismiss and do the following:
Dial *#197328640#
Tap the following: [1] UMTS > [1] Debugging screen > [8] Phone Control > [6] NETWORK LOCK
Tap [2] Perso Sha256 ON, and wait about 30 seconds
Reboot the phone.
You should be prompted for the unlock code again. Enter it and it should work this time (you should not see an invalid SIM icon in the status bar).
I'm anything but a phone expert so if these steps did not work for you, then I probably cannot help you, sorry.
+1 handful of threads on this from YEARS ago. You are missing out that this won't work unless you're on stock AND your modem needs to be a jellybean based one IRRC
http://forum.xda-developers.com/showthread.php?p=34661189#post34661189
xBkKx said:
+1 handful of threads on this from YEARS ago. You are missing out that this won't work unless you're on stock AND your modem needs to be a jellybean based one IRRC
http://forum.xda-developers.com/showthread.php?p=34661189#post34661189
Click to expand...
Click to collapse
What you linked was actually the very first thing I tried. However, the [4] NW Lock NV Data INITIALLIZ option was not there for me. It was RAT FREE SUPPORTING or something like that. The steps I posted were what worked for me.

SGH-i747 Archived Downloads 2021 Walkthrough

I picked up a decent used SGH-i747 to use as a spare house phone. It was bone stock UCUFNE4, and I went through the rooting process, flashing TWRP, some custom ROMs, and restoring my nand backups. Yes, on a nearly decade old phone! I forgot how much I missed this phone after it took the splash.
DO THIS FIRST : Network / Carrier Unlock SIM
I was finally running my old system but then tried a Red Pocket SIM card...I didn't think ATT locked their SIMs. I don't remember having to unlock my old d2att, but I've slept since then. You'll most likely have to be on the stock OS to network unlock the SIM. *You get 5 attempts to enter the unlock PIN code.
Have your device and IMEI handy.
Follow the directions on ATTs unlock site https://www.att.com/deviceunlock/
Insert a non-ATT SIM card and turn on the phone.
After fully booting, enter 8 digit PIN unlock code you recieved from ATT.
If unlock is "unsuccessful", you'll have to go through extra steps.​​Extra Steps
Insert a non-ATT SIM card and turn on the phone.
After fully booting, cancel / dismiss the unlock code screen.
Open the Dialer and enter *#197328640# to enter the hidden Service Menu. If entering the numbers in the dialer does not open the hidden Service Menu, you'll need to return to stock firmware.
In the hidden Service Menu, navaigate to: [1] UMTS > [1] Debugging screen > [8] Phone Control > [6] NETWORK LOCK > [1] Perso Sha256 INFO
If the value for Sha256 is "0" and off, this is the problem why entering the 8 digit PIN code was "unsuccessful". We need to turn it on.
Touch your left capacitive Menu key opening a navigation menu, and touch the "Back" option. (not the right capacitive Back key, that will exit the Service Menu)
Select "[2] Perso Sha256 ON" (I'm not sure if it's actually on yet, or touching the item "Perso Sha256 ON" in the resulting cascaded menu turns it on, so I touch it also)
Touch your left capacitive Menu key and select "End" to close the Service Menu.
Reboot phone and now entering the unlock code should work.
Return to stock firmware
Assuming you have TWRP recovery version >= 3.0.2-0
Download bootloader-modem_I747UCUFNE4_4.4.zip to a micro SD card. (I've tried other bootloader-modem packages that didn't work)
Download I747UCUFNE4_Stock_Rooted_Deodex.zip to micro SD.
Backup or transfer to external storage anything you want to keep on internal storage. (*you might be able to skip internal storage wipe)
Make sure micro SD is properly mounted as portable storage in the device, and boot into recovery.
Backup system/data/etc. *optional
Wipe partitions: Dalvik, System, Data, Cache, and *Internal Storage
Install bootloader-modem_I747UCUFNE4_4.4.zip
Install I747UCUFNE4_Stock_Rooted_Deodex.zip
Reboot to system.
Root and/or flash TWRP with ODIN
[reserved]
Here is my SGH-i747 download archive. I never delete my shared files off Google Drive, so they'll be here. Everything you should need to bring this device under heel.
SGH-i747 d2att - Google Drive
drive.google.com
Hey, just want to say Thanks for this.
I had a Galaxy S III kicking around and wanted to put in back in action - just like you for a house phone. Up until about 1 year ago I had GBs of ROMs for the phone - and then did the housecleaning "Who will ever need this old stuff anyway???" and deleted the whole works. I realized the error in my ways when I started looking for the files this AM
So, you've got me back on track with your "One stop shop"
Cheers
PS. By the way - which of the ROM's did you find smoothest & most responsive to run?
xda_maddogdean said:
PS. By the way - which of the ROM's did you find smoothest & most responsive to run?
Click to expand...
Click to collapse
Seems like custom ROMs for this device were better than other droids I've had. I think Liquid Smooth was the best performer, but limited to KitKat apps.
ssurell said:
Seems like custom ROMs for this device were better than other droids I've had. I think Liquid Smooth was the best performer, but limited to KitKat apps.
Click to expand...
Click to collapse
Thanks for the tips

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