[Q] Carrier Unlock GT-i9300 Android 4.1.2

[MySelf_v1]

Hello Fellas,

I've searched the forum but, nothing was helpful to me so, i think it's time for me to ask you questions :cyclops: .

A friend of mine bought a Samsung Galaxy GT-I9300 and, after few days, we figure out it was SIM Locked. Below, i'm gonna post all the informations of this device:

Model: GT-I9300
Android Version: 4.1.2
BaseBand: I300XXEMG4
Kernel: 3.0.31-1314436 [email protected] #1 SMP PREEMPT Tue Jul 16 20:28:36 KST 2013
Build: JZO54K.I9300XXEMG4
The carrier on which it is locked is: PosteMobile

The phone is already ROOTed.

Can anyone tell me where should i go and what should i do to unlock this device? How i've already said before, i've searched on the forum but, i've found only 2 methods:

- The one with the code and it won't work since it's a GT-i9300
- TechMayhem: but the last two answers in the thread doesn't encourage me at all. And, if this is not enough, Google says AndroidFirmwares.net it is not a trusted website.

Please, answer asap. Thanks a lot fellas :victory:

 

[sriram231092]

Hello Fellas,

I've searched the forum but, nothing was helpful to me so, i think it's time for me to ask you questions :cyclops: .

A friend of mine bought a Samsung Galaxy GT-I9300 and, after few days, we figure out it was SIM Locked. Below, i'm gonna post all the informations of this device:

Model: GT-I9300
Android Version: 4.1.2
BaseBand: I300XXEMG4
Kernel: 3.0.31-1314436 [email protected] #1 SMP PREEMPT Tue Jul 16 20:28:36 KST 2013
Build: JZO54K.I9300XXEMG4
The carrier on which it is locked is: PosteMobile

The phone is already ROOTed.

Can anyone tell me where should i go and what should i do to unlock this device? How i've already said before, i've searched on the forum but, i've found only 2 methods:

- The one with the code and it won't work since it's a GT-i9300
- TechMayhem: but the last two answers in the thread doesn't encourage me at all. And, if this is not enough, Google says AndroidFirmwares.net it is not a trusted website.

Please, answer asap. Thanks a lot fellas :victory:

tried this? SIM UNLOCK

 

[danarama]

There are no free options to unlock mg4 afaik. Not sure about purchasing unlock codes

-----------------------
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I do NOT reply to support queries over PM. Please keep support queries to the Q&A section, so that others may benefit

 

[MySelf_v1]

@SirRam: yes ....
@rootSU: Can i change the build? )

 

[danarama]

@SirRam: yes ....

@rootSU: Can i change the build? )

Only if you have an EFS backup from Before MG4

 

[MySelf_v1]

Not even if i install a custom ROM or Factory Reset the phone ? I don't have any EFS backup.

 

[danarama]

Not even if i install a custom ROM or Factory Reset the phone ? I don't have any EFS backup.

No. You need EFS v1./ With MG4 ROM you get EFS v2. There is no way to go back to EFS v1 without an EFS backup from YOUR phone when it was EFS v1. Custom ROMS and Stock ROMs cannot help you. There is nothing you can do. At all... Nothing.

 

[MySelf_v1]

There is a guy ( 1500km away from where i live ) that says he can do it but i should ship the phone to him. Is there any chance or it's just a scam?

 

[danarama]

There is a guy ( 1500km away from where i live ) that says he can do it but i should ship the phone to him. Is there any chance or it's just a scam?

He may have hardware that can do it, sure. Like I said before, there are no FREE options.

 

[mobileunlocked]

Why do people think you can't unlock this model using an unlock code? Of course you can. You'd need to reinstall the stock firmware but the code method will work.

 

[danarama]

Why do people think you can't unlock this model using an unlock code? Of course you can. You'd need to reinstall the stock firmware but the code method will work.

No one said you can't unlock it with an unlock code. We have only discussed the use of free methods not working, which is down to the new format of the EFS partition. This has all been stated in this thread.

fact is most unlock codes have to be purchased from some company who will send it in 24 hours+ and will charge for it. When there are free methods about, most people will not buy a code. I bet 80% of people here will wait for a free tool to work again instead of buying a code.

 

[mobileunlocked]

No one said you can't unlock it with an unlock code. We have only discussed the use of free methods not working, which is down to the new format of the EFS partition. This has all been stated in this thread.

fact is most unlock codes have to be purchased from some company who will send it in 24 hours+ and will charge for it. When there are free methods about, most people will not buy a code. I bet 80% of people here will wait for a free tool to work again instead of buying a code.

I'd imagine the percentage is higher than that!

I don't get the hostility but the OP said "The one with the code and it won't work since it's a GT-i9300" - maybe they meant something else, but I saw that as they were referring to an unlock code not working in the GT-i9300.

You also said "Not sure about purchasing unlock codes" which is a bit ambiguous. Are you referring to the effectiveness of them or a different aspect? In context however, it appeared to be their effectiveness.

 

[danarama]

I'd imagine the percentage is higher than that!

I don't get the hostility but the OP said "The one with the code and it won't work since it's a GT-i9300" - maybe they meant something else, but I saw that as they were referring to an unlock code not working in the GT-i9300.

You also said "Not sure about purchasing unlock codes" which is a bit ambiguous. Are you referring to the effectiveness of them or a different aspect? In context however, it appeared to be their effectiveness.

Sorry if you think I am being hostile. That is not my intention.

"Not sure about purchasing unlock codes"

Here is what I know.

We have free tools available that can alter the SIM lock of the S3, but with OS builds from 1st of July, the format of the EFS partition has changed and these free tools are no longer effective. I am not sure about purchased unlock codes. I have not used one so I cannot vouch for whether it works or not. I did not want to convey that there was categorically no way to unlock the phone because, as stated - I am not certain that is the case. I only wanted to convey that these free tools will no longer work.

In regard to a higher percentage buying unlock codes, nah. On any other android HELP forum - sure, maybe but on this DEVELOPERS forum (here) - Highly unlikely.

 

[mobileunlocked]

Sorry if you think I am being hostile. That is not my intention.

"Not sure about purchasing unlock codes"

Here is what I know.

We have free tools available that can alter the SIM lock of the S3, but with OS builds from 1st of July, the format of the EFS partition has changed and these free tools are no longer effective. I am not sure about purchased unlock codes. I have not used one so I cannot vouch for whether it works or not. I did not want to convey that there was categorically no way to unlock the phone because, as stated - I am not certain that is the case. I only wanted to convey that these free tools will no longer work.

In regard to a higher percentage buying unlock codes, nah. On any other android HELP forum - sure, maybe but on this DEVELOPERS forum (here) - Highly unlikely.

It's no problem - I must have taken it the wrong way.

What you're talking about there does ring a bell for me. I believe I was seeing a bunch of results in Google earlier in the year for relating S3 unlocking search terms and a free method being mentioned. It must have been the method you have mentioned there.

In regards to the percentage, I meant higher than 80% - meaning, I think more than 80% of people would opt for a free tool.

 

[danarama]

In regards to the percentage, I meant higher than 80% - meaning, I think more than 80% of people would opt for a free tool.

Ah gotcha.

Yeah there are a few tools that could unlock the S3 until July. The main one was GalaxSim unlock, but actually - he did add a payment method to it in the end. The beta app was free though.

 

[r_ween]

Why do people think you can't unlock this model using an unlock code? Of course you can. You'd need to reinstall the stock firmware but the code method will work.

i have the same problem, also ever try to back to the mg4 stock rom and buy a codes, but the codes stil not work.

http://forum.xda-developers.com/showthread.php?p=45871060#post45871060

 

[drastyk]

s

I have the same problem, I use the updated galaxsim tool (it was updated yesterday) but its doesnt work.galaxsim unlock sad its unlocked but nothing happens still locked and ask for unlock code.

 

[JJEgan]

I have the same problem, I use the updated galaxsim tool (it was updated yesterday) but its doesnt work.galaxsim unlock sad its unlocked but nothing happens still locked and ask for unlock code.

Relevant to the cost of the phone paid for unlock is peanuts .

 

[carapauzinho]

Hey guys,

Any news regarding this subject?
Today I went to my operator and they still want to charge me 150€ for unlocking my SGS3 with more than 2 years old...
Going back to an older ROM does not work, right?

Cheers!

 

[boomboomer]

Hundreds of identical posts, you can't downgrade unless you have an efs v1 backup. Go to an online unlock code provider, it will work the same as your operator code.