[Q] How to Unlock Samsung S3 AT&T running Andriod 4.3 - AT&T, Rogers, Bell, Telus Samsung Galaxy S III

I have a Samsung S3 I747 device. It is running ANdriod Version 4.3, I747UCUEMJB.
I wanted to unlock this and was wondering if this is possible. I went through lot of threads on this forum, but that left me confused and could not figure out if it is possible or it is not possible, without calling AT&T or without buying the unlock code.
There were some threads which said that we can go back to 4.1.1 or something. (I have been able to unlock the other phone which is running 4.1.2 but for this I cannot go back).
I am a newbie with phones and andriods, and hence was looking for simple instructions if any available to lock this 4.3 andriod that I have.
Any help would be greatly appreciated.

Once on 4.3 or later the free unlock method will not work. Only getting a code from the carrier or buying one online will.

Related

Downgrading from 4.4.2 to 4.1.1 to SIM unlock, possible yet?

Hi, I'm thinking about buying a note 2 that is locked to a carrier that isnt mine, I've had a note 2 previously before the 4.4.2 update and successfully unlocked it by flashing 4.1.1 and using the service menu, from my understanding this isn't possible now because of the 4.4.2 bootloader. Is there a work around for this yet? I'd like to save $20 on unlocking it if possible.
Nvm! Phone has 4.3 on it, I'm in the clear!

How to Unlock S3 t999 4.3?

Hi to all, im new on the forum, i was looking to find a way to unlock my S3 t999 which has the android 4.3 JB, i got a lot of info but it seems that i only Rooted my S3, i found out that there an easy way to do it whit the Service mode but since i have Stock 4.3 its impossible, was looking a way to downgrade to 4.1.1 but probably ill get a brick, so if there any way that i get some help unlocking my device i sure will appreciate it.
After 4.1.2 I think there is no free alternative available (unless your carrier gives unlock codes for free after a certain time period). The best way to unlock your phone would be by contacting your carrier for an unlock code which usually means paying a fee or using a pay service. I would recommend using your carrier because they will offer better support and this would reduce your risk of getting scammed by a online service.
Help please!
Hi! Where do I begin?! So I have a tmobile s3 T999LTE version. Previously I rooted it because I wanted custom rom on my phone. Then I wanted to sell it so I unrooted it. I had read somewhere that after unrooting I should revert to latest stock firmware which was 4.3...BIG MISTAKE! It's now running on 4.3...LUVUBOH1 and I CAN'T UNLOCK IT! Tmobile had sent me a code which did not work, then I switched to metro pcs and purchased a code off ebay,which was the SAME code tmobile had given me. I now have metro pcs on another phone and when I put in my current sim in s3 it doesn't prompt for code! And no key combos are working due to change in dialer. I am stuck and gave no idea how to fix it. Imei is valid and I'm pretty sure I'm running stock 4
3. Help anyone? Please? ???
Was the phone running a completely stock rom when you tried to enter the code? How many times did you try to enter the code?

[Q] Sim unlock on custom ROM. Tmobile support not being helpful.

So I'm currently in Europe and I will be here for 2 more months and I would like to unlock my phone because $4.19 a minute is ridiculous. However tmobile support is being, let's say very smart. The first representative said "just visit you're nearest tmobile store and we'll help you out there." After I had already told them I was in a country without tmobile. So I was wondering if there was any way to do this for free? I really don't want to have to spend any more money right now. I'm currently running liquidsmooth lollipops latest build. And I really don't want to have to revert to stock because I currently have Internet speeds of 85kb/s and that would take ages to download and then reset up my phone. All help is greatly appreciated.
You cannot. Need TouchWiz
serio22 said:
You cannot. Need TouchWiz
Click to expand...
Click to collapse
Which version should i downgrade to, and could you give me a like to a method of unlocking it?
Before flashing any TW ROMs via Odin, confirm the bootloader and modem on your phone.
I'm not sure but if the T999 is like the i747 (ATT s3 version), you cannot downgrade the bootloader from 4.3 to a lower version. Doing so may brick the phone.
If you are on a 4.1.1 or 4.1.2 bootloader, you should be able to downgrade to stock 4.1.1 and you may be able to unlock for free using this method: http://forum.xda-developers.com/showthread.php?t=2014982
If you cannot downgrade to stock 4.1.1, you'll need to buy an unlock code and enter it using a stock Samsung dialler.

[Q]Help SIM unlocking Tmobile SGH-T999 for use in South America!

Hi all, I've been reading tons of threads and I am still having some difficulties with this phone. I am not in the US, I got this phone from a coworker that was going to throw it away and brought it with me to south america to give it to my friends mom who has no money, its and old phone but the one she has is even crappier ,I thought I would be able to just pop the SIM and get it going but nope.
If anyone could point me in the right direction I would really appreciate it, I have a few more days before I go back home and I would love to be able to leave this working for her.
Let me put you up to speed:
-Phone is running Android 4.3
-Phone was rooted using Odin, has SU and CWM
-Followed thread here to SIm unlock: https://forum.xda-developers.com/showthread.php?t=2023709 but #4 option is not present on 4.3
-I tried downgrading to 4.1.2 custom root666 to see if I could get #4 but to no avail since you cannot from this 4.3 version
-About to follow this thread :https://forum.xda-developers.com/showpost.php?p=48012926&postcount=8
but not sure if correct for what I want to do.
No more ideas, please help!
The phone can only be unlocked used an unlock code. Try contacting T-Mobile for a free unlock code or buy a code from eBay.
i'm with the same problem. i bought an sgh-i747 and after two months it bricked, so i replace the logical card (i don't remember how to say it in English, lol.) and boom!!! now i have a t999 and it doesn't work with movistar. (i'm from Venezuela)
but well, i've been reading posts about unlocking the phone and every one of them only works in JB 4.1.x. i don't know if i could unlock it by the downgrade process and i'm scared of getting the phone bricked again.

Samsung Note 2 sgh-i317 running 4.4.2 nj5 downgrade to 4.1.1 to unlock?

ok trying to end up with a android 5.0 + on my att note 2.
Here's where im at : already went though the process of requesting unlock via at&t attempted unlock with no success
(unsure if i permanently sim locked to att or not) so now from what i have read i would have to downgrade from 4.2.2 kitkat to 4.1.1 to unlock via loophole? my problem is unable to find my modem/radio (I317UCSCNJ5) im new to this process but does that mean i cant downgrade? i cant seem to find much about nj5 in any of the stickys or the all in one shop any help or ideas would be much appreciated

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