[Q] simlock efsv2 - Galaxy S III Q&A, Help & Troubleshooting

How do i unlock simlock in i9300 and with efsv2? the phone was previously working on some branded samsung official 4.3 and i flashed it to 4.4 by Archi

Buy an unlock code.

ehhhm no im not going to buy any code...i know there was a method for hex editing some file that would bring the simlock flag down...i know it is possible on efs v1 but can anybody say if its the same on v2 ?

No, it isn't.

EFSv2 has encrypted EFS based on phones hardware ID
you cannot simply change a byte to remove the lock
you have several solutions in this
1 buy unlock code
2 unlock online at www.UnlockSamsungOnline.nl (needs root access)
3 bring to unlock / telecom shop, where they unlock it over servicebox (need root also)

Related

[Q] Unlock & Root

I have the Atrix, but not a unlockcode yet. Can I root the phone before the unlock? Or is it wise to wait untill it is unlocked.
the order does not matter. unlocking is for freeing the imei from the carrier, rooting is for aftermarket software purposes.

[Q] Problem about bootloader of SK17

Good day !
I have come across a situation of unknown bootloader of SK17 .
I found some shop in Hong Kong is selling some cheap SK17 (not sure if it is the same as SK17i) . I asked the shop keeper and they said that the bootloader is locked , but without SIM lock .
So , will someone confirm me if this situation is possible ? As I read some post in this form it indicate that locked bootloader is usually because it is branded , i.e. SIM locked . If it is SIM free version does it mean I can make the bootloader unlock ?
And , what if the system shows "Bootloader unlockable ? No" ? Is there any way to work around this issue to make the bootloader unlock ?
Thanks so much !
Rgds,
Kurz
Hi!
A simlock is something totally different to the bootloader´s lock.
No Simlock means that you can use any sim of any provider you like and who´s band is supported by phone´s hardware.
The bootloader ist locked by sony basically to prevent people from removing the sony Firmware even if it is not branded. A second issue is probably to prevent people from unlocking and playing with the firmware who do not know what they do.
Before the lock of the bootloader it was easy for everyone with one-click-tools or similar to root the phone. This could have led to many RMA procedures at Sony
But there must be a possibility to unlock it due to the terms of open source software.
So there is no need for you to unlock the bootloader as it takes any simcard anyway.
What the issue about sk17i sk17 and sk17a is, I do not know yet. But I´m curious about it
hi... how to know that your xperia mini pro unlock already in bootloader?
my rooting status is,
Bootloader unlock allowed: YES
is it already unlock in bootloader?? or not
It meens that it is be allowed to unlock your bootloader. It means not that your bootloader *is* unlocked.
Hi Poedel ,
Yes I understand SIM locked and Bootloader locked is different . But I wish to install 3rd party roms (CM7 rulez) , so I still wish to know how to unlock the bootloader .
So maybe I change a little bit about my question .
1) a sim unlocked device with locked bootloader (bootloader unlock allowed : no) cannot unlock due to the SIM lock . Then will it allow to unlock if the device change to SIM unlocked ?
2) Any method to work around the locked bootloader (bootloader unlock allowed : no)
3) Any way to unlock the bootloader if IMEI code cannot be used to extract the unlock code ? As I know some of the shop will use flash rom writer to wipe with another device firmware and IMEI will changes (it happens last time when I buy a X01HT) .
Thanks a lot !
Rgds,
Kurz
Sent from my Milestone using XDA App
mkmonkey said:
Hi Poedel ,
Yes I understand SIM locked and Bootloader locked is different . But I wish to install 3rd party roms (CM7 rulez) , so I still wish to know how to unlock the bootloader .
So maybe I change a little bit about my question .
1) a sim unlocked device with locked bootloader (bootloader unlock allowed : no) cannot unlock due to the SIM lock . Then will it allow to unlock if the device change to SIM unlocked ?
this is still confusing The simlock does not take care at all if there is a bootloader-lock or not. I never ask someone if I am allowed, definetly not mr. simlock
2) Any method to work around the locked bootloader (bootloader unlock allowed : no)
3) Any way to unlock the bootloader if IMEI code cannot be used to extract the unlock code ? As I know some of the shop will use flash rom writer to wipe with another device firmware and IMEI will changes (it happens last time when I buy a X01HT) .
Click to expand...
Click to collapse
okay, usually you'll go to the sony's dev site bootloaderunlockl.sonyericsson.com (don't know the correct sub, could be correct) and authenticated by your IMEI and email you'll get the unlock code. Without IMEI you won't be able to unlock. But even if you IMEI changed you can try the current IMEI. What I think is that Sony just saves the Email and IMEI into a mySQL Database to cope with the situation if your device enters RMA à la "you unlocked, your fault". It would be rather not the way that they look if your current IMEI really belongs to the device there. I would simply try it. BUT!
There is a post where a method is shown to root your ph0ne without unlocking the bootloader.
So here are both links:
rooting without unlocking not tested by me (even not yet read *covering*)
default way like I did it
Dear Poedel ,
Thanks , that's exactly what I wish to know .
So in worst case if bootloader is not going to unlock in normal way , I should use the test point function to bypass it and flash another room and firmware into it , and unlock the bootloader again ?
Thanks very much !
Regards,
Kurz
Sent from my Milestone using XDA App

Question about relock sim for warranty

Hi , I have a SGS3 unlocked sim with nv_data.bin patched method but now I have the code unlock of operator
http://forum.xda-developers.com/showthread.php?t=1731931
How can I do for the phone request the code of unlock ? because I cann`t find the method
( the method of relock of this post with secuence *7465625*638*# doesn´t work in SGS3 )
I have restore the file nv_data.bin with the original and It doesn`t work
thanks
any idea ?

[Q] Sim Unlock Codes - How?

Let me just start off by saying I have tried everything (free) under the sun to unlock my S3 (I9300). I have learnt more in the last 2 days about my phone than I have in the past 2 years of owning it. From rooting and trying unlock apps to downgrading and trying the service mode glitch, I've tried it. It is more of a quest at this point. I would have paid to unlock it by now if it wasn't for my stubbornness.
From what I understand, since I am on version 4.3 and have EFS v2 (with no EFS v1 backup), there is no way to network unlock my phone without getting an unlock code from my network or a website, both of which require payment.
I can understand how the network is able to get an unlock code but what I don't understand is how various websites can 'calculate' unlock codes for my device, especially without the device at hand.
In theory, why can't I calculate the unlock codes myself? If I can, how?
No, codes aren't calculated -they come from a database that you can't access. Give up and buy a code.
BPate said:
I can understand how the network is able to get an unlock code but what I don't understand is how various websites can 'calculate' unlock codes for my device, especially without the device at hand.
In theory, why can't I calculate the unlock codes myself? If I can, how?
Click to expand...
Click to collapse
I actually have the codes that Vodafone provides free of charge with it's Network unlocking tool, unfortunately these codes don't work and they have yet to give me a reason why. The only thing I can hope for is a way to flash back to efs v1 but so far as I know it's impossible.

Understanding network unlocking

Why does each of us have to pay to unlock their phone model from a network when only one of us could unlock and then help others ?
Thats why I think we need to understand how phone unlocking works. I've searched and could not find any tutorial. I suggest this to be general advice and not any specific device.
So questions:
When I insert the unlock code into an android device, what files or partitions are modified ? Then could we not clone that and share the image with other users ?
It doesn't work like that. Each IMEI gets its own code by the carriers. It's not even an Android thing as all software come to the carrier unlocked and the carrier then adds in its own stuff excluding then lock codes.
We all know that each phone has its own IMEI. But to be more clear in byte-code language, we need to understand, how does the phone itself know "am I a locked phone or an unlocked one ?" Or in other words, do those who own websites to unlock code break the algorithm themselves or do they buy it from producers ?
Actually some have discovered that it's mmcblk0p6 in their case that changes when applying the unlock code, and using tools such as "string -n 8" to read that partition. But we need to uncover more than that, we don't know the partition name that need to be changed in other cases.

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