Network Unlock your ATT SGS3 for free (howto)

Search This thread
By:
Advanced…
stewartsoda

stewartsoda

Senior Member
Apr 25, 2008
595
129
Somewhere In Idaho
I just saw this on Reddit and tried it on my ATT SGS3. I used an old StarHub SIM I had laying around and it didn't ask for the unlock code, so I'm pretty sure it worked.

The instructions are for the GSM Note 2, but the author says it works for the GSM SGS3, too.

http://xdaforums.com/showpost.php?p=34661189&postcount=1

I think you have to be on a stock ROM to get it to work. I was running UCALH9, bone stock. Don't forget to thank the OP on the other thread!
 
  • Like
Reactions: androiddude911, garymartin0591, ipilcher and 9 others
stewartsoda

stewartsoda

Senior Member
Apr 25, 2008
595
129
Somewhere In Idaho
AndreaCristiano said:
just tried it everything seems the same any way to tell without putting in another sim?
Click to expand...
Click to collapse

I don't know. Since the SIM I had laying around was not a mini-SIM I had to chop it up, too. O_O

In theory you don't ever see the unlock prompt unless you insert a non-network SIM anyway, so I don't think there's any way to check without one.
 
  • Like
Reactions: AndreaCristiano
L

littlemarine88

Member
Jun 3, 2010
16
2
Aboro, n.c
Ok so I didnt think this would work but it honestly did took two tries but I was able to insert a tmobile sim on a locked att phone without being prompt for the network unlock code and I did confrim I was able to make a call

Sent from my SAMSUNG-SGH-I747 using xda app-developers app
 
Last edited:
  • Like
Reactions: AquaWater
jethro650

jethro650

Senior Member
Dec 17, 2010
579
256
w98seeng said:
Same here. I tried all the steps, but when I got to "now you are in [6] Network Lock then choose [4] NW Lock NV Data INITIALLIZ", I didn't have the "[4] NW Lock NV Data INITIALLIZ" option, just the original 3 choices.

Ian
Click to expand...
Click to collapse

Tried two different Bell phones.....same outcome.
 
Booboo64

Booboo64

Senior Member
Apr 5, 2011
74
14
Dallas
If you are in the US with AT&T just call AT&T and tell them you are traveling abroad. You'll get the code right away. I chatted with support with a 2-week old SIII and got it right away.
 
C

crazililazn

Senior Member
Nov 27, 2008
894
35
Question. How do you know if your phone is unlocked? I tried this on Serenity 1.2 with LH9 modem installed and I was able to insert a SIM card that I used when I was overseas. Does that mean I'm unlocked?

Nvm, my international SIM picked up T-Mobile while roaming... even though I don't have roaming enabled ><
 
Last edited:
You must log in or register to reply here.

Similar threads

cyanogen
[ROM][OFFICIAL] CyanogenMod 10 Nightly Builds for SGH-I747
Replies
17K
Views
3M
P
pmgnet
mrRobinson
[HOWTO] [ROOT] No Tripping Flash Counter - [ATT / Bell / Telus / Rogers / Sasktel]
Replies
2K
Views
920K
D
dawgdoc
SeanHacker
[ROM] AOKP 4.4.4 (Kitkat) Task650 (9.10.2014) (Unified)
Replies
29K
Views
5M
SeanHacker
SeanHacker
D
How to Unlock Your Samsung Galaxy S3 & Note 2 (No Rooting)
Replies
355
Views
834K
T
tpbill
ogdobber
Google wallet fix for SGS3 US variants AT&T, T-MOBILE, US Cellular, VERIZON, etc
Replies
4K
Views
563K
RaymondPJR
RaymondPJR

Top Liked Posts

24 Hours All time
  • There are no posts matching your filters.
  • 12
    stewartsoda
    stewartsoda
    I just saw this on Reddit and tried it on my ATT SGS3. I used an old StarHub SIM I had laying around and it didn't ask for the unlock code, so I'm pretty sure it worked.

    The instructions are for the GSM Note 2, but the author says it works for the GSM SGS3, too.

    http://xdaforums.com/showpost.php?p=34661189&postcount=1

    I think you have to be on a stock ROM to get it to work. I was running UCALH9, bone stock. Don't forget to thank the OP on the other thread!
    View
    4
    jethro650
    jethro650
    FWIW, after following the steps if you do it again when you get to this point
    " [3]Perso SHA256 OFF > (after choosing this option, wait about 30 seconds,"
    You will get a screen saying no change. This would mean that it worked the first time and your phone is already unlocked. I've done 5 S3's and checked with different SIM cards and it worked every time, 3 of those I went back and tried the steps a second time and all three gave me the no change message. Sort if a confirmation that it worked if you don't have another SIM to try.
    3 Bell S3s, 2 Telus S3s and tried on my S3 but got the no change right away as it was already unlocked when I bought it.
    View
    3
    dirkdigles
    dirkdigles
    FYI:

    Now you can get an unlock code from AT&T for free even if you're not a customer. As long as your phone meets the unlock eligibility requirements, they'll send you a code to unlock.

    Proof? I am not an AT&T customer, and have an unused i747 that I wanted to unlock. I filled out their request form on Friday, and just received my code 30 minutes ago! And voila, my i747 is now unlocked.

    Info: http://www.androidpolice.com/2015/0...u-sim-unlock-your-phone-heres-the-fine-print/

    Here's the AT&T page:

    https://www.att.com/deviceunlock/#/

    Enjoy!
    View
    2
    S
    Sakiwinkie
    This method for unlocking your phone works perfectly after Jelly Bean update on Rogers sgs3.

    Sent from my SGH-I747M
    View
    1
    stewartsoda
    stewartsoda
    AndreaCristiano said:
    just tried it everything seems the same any way to tell without putting in another sim?
    Click to expand...
    Click to collapse

    I don't know. Since the SIM I had laying around was not a mini-SIM I had to chop it up, too. O_O

    In theory you don't ever see the unlock prompt unless you insert a non-network SIM anyway, so I don't think there's any way to check without one.
    View

New posts