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[Guide] At&t Note 3 Sim Unlock

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tyiphius

Senior Member
Sep 8, 2011
115
82
I bought two At&t Note 3s yesterday. One for me and one for a friend. I'm on At&t and my friend is on MetroPCS. I called At&t for an unlock and they couldnt get me a code, even though one was paid in full price and "qualified" to get unlocked according to them. So this is how I got the phones unlocked.

Reminder: I'm not responsible for any damage you may do to your phone. Proceed at your own risk!

Root is Required!

1. To root your At&t Note 3 follow this guide (Thank You designgears!)
http://forum.xda-developers.com/showthread.php?t=2474422

2. You will need to allow unknown sources to be installed.
Settings>General>Security>Unknown Sources (Make sure its checked)

3. Install Chainfire's RegionLock Away App from Google Play Store (and buy him a beer :highfive:) or download it from here.
http://forum.xda-developers.com/showthread.php?t=2470551

4. Tap "Region Unlock" in the app

5. Let it do its thing

6. Choose Reboot Later (Thats what I did at least)

7. Turn off the phone and try a non-At&t sim card.


I tried my old T-mobile sim in mine and it pulled up, and we just got back from the MetroPCS store and have his running on that.
 

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Last edited:

sinichi21

Senior Member
Oct 14, 2010
1,170
345
Los Angeles
I bought two At&t Note 3s yesterday. One for me and one for a friend. I'm on At&t and my friend is on MetroPCS. I called At&t for an unlock and they couldnt get me a code, even though one was paid in full price and "qualified" to get unlocked according to them. So this is how I got the phones unlocked.

Reminder: I'm not responsible for any damage you may do to your phone. Proceed at your own risk!

Root is Required!

1. To root your At&t Note 3 follow this guide (Thank You designgears!)
http://forum.xda-developers.com/showthread.php?t=2474422

2. You will need to allow unknown sources to be installed.
Settings>General>Security>Unknown Sources (Make sure its checked)

3. Install Chainfire's RegionLock Away App from Google Play Store (and buy him a beer :highfive:) or download it from here.
http://forum.xda-developers.com/showthread.php?t=2470551

4. Tap "Region Unlock" in the app

5. Let it do its thing

6. Choose Reboot Later (Thats what I did at least)

7. Turn off the phone and try a non-At&t sim card.


I tried my old T-mobile sim in mine and it pulled up, and we just got back from the MetroPCS store and have his running on that.

Wow thanks it work never thought it would work like magic
 
D

Deleted member 657471

Guest
I can confirm that this worked to unlock mine. I tried a T-Mobile SIM and was able to make a call. Thanks.
 

Whoflungdu

Senior Member
Dec 2, 2012
145
104
I have an unlocked note 3 simply I went into the AT&T store where I live and said unlock it or I won't buy it and bam they did it. I have a simple pay as you go T-Mobile card popped it in, input the code and unlocked I was. I had to buy the phone outright so was costly but not at all risky. LTE showed up just fine on the T-Mobile network.

Sent from my SAMSUNG-SM-N900A using xda app-developers app
 

tyiphius

Senior Member
Sep 8, 2011
115
82
This works! I wonder if this affect the LTE because I think it modifies the modem. Have you notice a difference?

Same question.

Sent from my SAMSUNG-SM-N900A using Tapatalk

I havent noticed a difference. Everything is still fast for me.

I have an unlocked note 3 simply I went into the AT&T store where I live and said unlock it or I won't buy it and bam they did it. I have a simple pay as you go T-Mobile card popped it in, input the code and unlocked I was. I had to buy the phone outright so was costly but not at all risky. LTE showed up just fine on the T-Mobile network.

Sent from my SAMSUNG-SM-N900A using xda app-developers app

You lucky mother fu:D
I asked at&t here about that since i bought one full price and they said, to call customer service. So did the next day and they "couldnt" give me the network code. I honestly dont care about an unlock as I'm on At&t.
The only difference is that you're phone wont be region unlocked. Sim unlock and region unlock are different.
Did you buy your phone full price/off contract?
 

Whoflungdu

Senior Member
Dec 2, 2012
145
104
You lucky mother fu:D
I asked at&t here about that since i bought one full price and they said, to call customer service. So did the next day and they "couldnt" give me the network code. I honestly dont care about an unlock as I'm on At&t.
The only difference is that you're phone wont be region unlocked. Sim unlock and region unlock are different.
Did you buy your phone full price/off contract?

Yeah I did buy it full price out of contract. As for the region unlock luckily we still have Chainfires method for that fix.

Sent from my SAMSUNG-SM-N900A using xda app-developers app
 

tyiphius

Senior Member
Sep 8, 2011
115
82
Yeah I did buy it full price out of contract. As for the region unlock luckily we still have Chainfires method for that fix.

Sent from my SAMSUNG-SM-N900A using xda app-developers app

Thats kinda of upsetting. I walked into the store and told them I wanted one full price and they were like "There's no 'full price', its just at&t next and you pay it off all at once if you want". I went online and showed them the option to do full price OR next, and they said they couldn't sell full price in the store. Didn't understand that because my s3 and note 3 were both full price at the store, Plus I've found deals with coupons online and they've matched it before! I hate when I go somewhere and I know more than the person working with me (I think he was just trying to get more commission off me.IDK). : They made me wait longer for the phone than I should've too. Guess my store here just sucks :rolleyes

Kudos to you. Wish that would've happened to me!
 

Whoflungdu

Senior Member
Dec 2, 2012
145
104
Thats kinda of upsetting. I walked into the store and told them I wanted one full price and they were like "There's no 'full price', its just at&t next and you pay it off all at once if you want". I went online and showed them the option to do full price OR next, and they said they couldn't sell full price in the store. Didn't understand that because my s3 and note 3 were both full price at the store, Plus I've found deals with coupons online and they've matched it before! I hate when I go somewhere and I know more than the person working with me (I think he was just trying to get more commission off me.IDK). : They made me wait longer for the phone than I should've too. Guess my store here just sucks :rolleyes

Kudos to you. Wish that would've happened to me!

I had herd a lot of horror stories like this before I went it but I knew my facts as it seems you do too. An I was just very blunt and studdorn, but also polite. I explained I travel to Europe all the time since I am English and I refuse to pay international rates. An I guess I got the 1 guy in all AT&T that was willing to go to bat for me.

Sent from my SAMSUNG-SM-N900A using xda app-developers app
 

Limeybastard

Senior Member
Oct 3, 2013
6,949
1,270
Florida unfortunately.
I had herd a lot of horror stories like this before I went it but I knew my facts as it seems you do too. An I was just very blunt and studdorn, but also polite. I explained I travel to Europe all the time since I am English and I refuse to pay international rates. An I guess I got the 1 guy in all AT&T that was willing to go to bat for me.

Sent from my SAMSUNG-SM-N900A using xda app-developers app

Me too. Going back to London next month, I shall see if the my N900T works there with a local sim card. Any recommendations on what sim to get when out there?
 

Limeybastard

Senior Member
Oct 3, 2013
6,949
1,270
Florida unfortunately.
EE is the largest provider in England but there are also Vodafone, 3, and someone else.

Sent from my SAMSUNG-SM-N900A using xda app-developers app

Wasn't EE orange and t mobile joining? I have to verify the lte band support they offer and chose one based on what my unit is compatible with. There is O2 also.

Sent from my SM-N900T using Tapatalk
 

Whoflungdu

Senior Member
Dec 2, 2012
145
104
Wasn't EE orange and t mobile joining? I have to verify the lte band support they offer and chose one based on what my unit is compatible with. There is O2 also.

Sent from my SM-N900T using Tapatalk

That's exactly right yeah so you will probably have your best chance with them since your using a T-Mobile device here.

Sent from my SAMSUNG-SM-N900A using xda app-developers app
 

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  • 22
    I bought two At&t Note 3s yesterday. One for me and one for a friend. I'm on At&t and my friend is on MetroPCS. I called At&t for an unlock and they couldnt get me a code, even though one was paid in full price and "qualified" to get unlocked according to them. So this is how I got the phones unlocked.

    Reminder: I'm not responsible for any damage you may do to your phone. Proceed at your own risk!

    Root is Required!

    1. To root your At&t Note 3 follow this guide (Thank You designgears!)
    http://forum.xda-developers.com/showthread.php?t=2474422

    2. You will need to allow unknown sources to be installed.
    Settings>General>Security>Unknown Sources (Make sure its checked)

    3. Install Chainfire's RegionLock Away App from Google Play Store (and buy him a beer :highfive:) or download it from here.
    http://forum.xda-developers.com/showthread.php?t=2470551

    4. Tap "Region Unlock" in the app

    5. Let it do its thing

    6. Choose Reboot Later (Thats what I did at least)

    7. Turn off the phone and try a non-At&t sim card.


    I tried my old T-mobile sim in mine and it pulled up, and we just got back from the MetroPCS store and have his running on that.
    3
    I bought two At&t Note 3s yesterday. One for me and one for a friend. I'm on At&t and my friend is on MetroPCS. I called At&t for an unlock and they couldnt get me a code, even though one was paid in full price and "qualified" to get unlocked according to them. So this is how I got the phones unlocked.

    Reminder: I'm not responsible for any damage you may do to your phone. Proceed at your own risk!

    Root is Required!

    1. To root your At&t Note 3 follow this guide (Thank You designgears!)
    http://forum.xda-developers.com/showthread.php?t=2474422

    2. You will need to allow unknown sources to be installed.
    Settings>General>Security>Unknown Sources (Make sure its checked)

    3. Install Chainfire's RegionLock Away App from Google Play Store (and buy him a beer :highfive:) or download it from here.
    http://forum.xda-developers.com/showthread.php?t=2470551

    4. Tap "Region Unlock" in the app

    5. Let it do its thing

    6. Choose Reboot Later (Thats what I did at least)

    7. Turn off the phone and try a non-At&t sim card.


    I tried my old T-mobile sim in mine and it pulled up, and we just got back from the MetroPCS store and have his running on that.

    Wow thanks it work never thought it would work like magic
    3
    3 questions

    how do 3rd party generate/supply unlock codes for peeps like us, are these 1 time use codes, or can they be shared?

    I want to pay to unlock tomorrow and join t-mobile, who/which website is latest on the xda trustworthy list?

    To answer 1 of your questions....

    The unlock code is verified by the handset and is generated by the manufacturer, typically by an algorithm such as a one way*hash*or trapdoor function. Sometimes big telecom providers change the original factory unlock codes as an extra layer of security against unlocking services. For various big brands such as Samsung and Motorola there is no algorithm but just a random code generator where the unlock codes are programmed in the phone itself and then saved in a big database managed by the manufacturer. For the other brands where the unlock codes are still based on algorithms those are based on the*IMEI*number and the*MCC*code and have been*reverse-engineered, stolen or leaked. Some handsets can be unlocked using software that generates an unlock code from an IMEI number and country and operator details using the algorithm specific to the handset. Other manufacturers have taken a more cautious approach, and embed a random*number in the handset's*firmware that is retained by the network on whose behalf the lock was applied and the manufacturer. These handsets can still be unlocked by online services that have access to either inside people with the manufacturer or with the telecom networks, or they need to be connected to the computer with a cable where specific software will bypass the security and SIM-unlock the phone. Sometimes this is done by advanced calculations to bypass the security the official way and other times using exploits or overwriting parts of the firmware where the lock status is kept, and often even recover a phone that is*bricked*or completely damaged in the software sense.
    2
    can mj5 4.3 sim unlock? i brought att phone with mj5 and 4.3

    I'm in the same boat. I got an AT&T N900A and it's on MJ5 running 4.3. I tried using the method in this forum but the sim unlock still pops up when I reboot the phone. Any free methods that work?

    Same! I got an AT&T N900A and it's on MJ5 running 4.3. I'm trying to find out a "free" way to do a sim unlock so that i can use my T-mobile SIM card. Can anyone confirm whether or not this is possible, and if so, point me in the right direction?

    thanks!

    From oldest to newest:
    ... MI9 -> MJ5 <-> NB4 -> NC2 (Kitkat)
    RegionUnlock tool only works on MI9 or older.

    If you are on MJ5, no there is no way to go back to MI9 or older.
    There is no way to unlock for free with this tool. Stop wasting your time.

    I got mine unlocked through AT&T after several attempts. My HTC One was unlocked but after several replacements they sent me Note 3. I had to argue that the phone I returned was a unlocked phone, so this Note3 should also be unlocked. They escalated the case and after a week or so I got my unlock code.

    Seriously, this forum needs some kind of a wiki page on beginning of the thread so that anyone can edit vital information. Otherwise OP it's all up to OP to update his post with these info.
    2
    Sim unlock

    It worked on 2 Note 3 - so far, thanks!!! 2 of 2..... Woot Woot.