[CLOSED] Bootloader Unlock Allowed "No" to "Yes" is now finally possible.

[MrCooper95]

Bootloader Unlock Allowed No to Yes is now finally possible

Discovered by MrCooper95


QUICK STORY OF HOW IT HAPPENED
​

For years, members of Xperia users thought that if you had a SIM locked Xperia phone, you would never able to unlock the bootloader even after you get it SIM unlocked, the Bootloader Unlocked Allowed will still remain "No".

​

You would have to buy a factory SIM unlocked phone instead.

For a good price, I've bought a used SIM locked Xperia 1 that has been hardlocked ( 0 unlock attempts left )

The previous owner tried to get it SIM unlocked, but the codes he used were incorrect and went over the unlock attempt limit, causing a SIM hard lock. He did not mention this when he put it up for sale.

Anyway, I looked around the internet and the found a program called QUnlock. ( S1 Network Unlock Tool )

The S1 Network Unlock Tool is free to download but you have to pay credit in order to work. About £20 ( you pay via mobile phone repair shop websites ) and then they will email you a username and password for you to connect to the S1 server in the unlock tool.

So I connected the Xperia 1 via flash mode in S1 Network Unlock Tool and it worked. My phone is now SIM unlocked after being hardlocked.

​

After booting up the phone. I went into service menu to ensure that it is free from SIM hardlock, the tool worked successfully.

​

but I also checked the bootloader status and it changed to "Yes".

I was suprised and amazed at the same time after all these years, we were told that changing the bootloader status No to Yes is impossible, even people told us that a permanent hard locked Xperia phone can never be reset.

QUESTIONS AND ANSWERS​

Q. What is the S1 Unlock Tool and what does it exactly do?

The S1 Network Unlock Tool is used by professional mobile phone repair shops and it has been around for a long time. This tool is created and only works for Xperia phones.

It is also available to be downloaded for anyone who can do it themselves at home with just a USB Cable.

This tool is used primarily to reverse a Xperia phone with a permanent SIM hard lock ( 0 unlock attempts left ) and changes it SIM unlocked.

​

It can be used as a normal SIM unlocking service.

​

However nobody really knew, that this tool can also change your bootloader status from "No" to "Yes".

Q. Can I use this tool to change my bootloader from No to Yes if my SIM is already unlocked?

So far yes, some members of Xperia users has reported back to confirm that it works.

​

Q. Why are some Xperia phones not allowed to have its bootloader unlocked?

Because it is originally made SIM locked to a Network Provider/Carrier. ( Factory SIM lock )

​

Network Providers/Carriers restricts you unlocking your bootloader due to warranty and safety reasons.

Q. Does this tool directly unlock the bootloader?

The tool does not directly unlock the bootloader, it just allows you to get the bootloader unlocked.

You would still need to follow Sony's official procedure of unlocking your bootloader.

IMPORTANT INFORMATION
​

You should always back up your Trim Area Partition (TA.img) if your Sony phone has a backup exploit.

After you have unlocked the phone using the tool, a sign file ( backup ) is created in the tool folder.
Don't delete it, keep it incase anything goes wrong. ( See warning below )

WARNING
​

There are reports from some users encountering a no SIM card service / detection after they have used the tool. It is evidently related ( so far ) with some of the Japanese Xperia models.

Japanese SO Xperia model ( Docomo / SoftBank )

Japanese SOV Xperia model ( KDDI )

If this happens, restore the backup and get your refund or try flashing a custom ROM or another firmware ( only if it's safe to do so for Japanese Xperia models )

DISCLAIMER​

I will not be responsible for any actions that you make. I am informing you that the S1 Network Unlock Tool can have consequences as it is not fully documented yet.

Please reply back with your Xperia and its model number if you have successfully unlocked your bootloader.

I will keep the thread updated, best of luck.

DOWNLOAD LINKS​

S1 Network Unlock Tool

Works on all Sony Xperia Models manufactured after 30/06/2014.

( Updated Support for Xperia 1 III, Xperia 5 III and Xperia 10 III )

MOD EDIT: Link Removed

Trusted website to buy credits

There are many websites that you can buy credits from, however some might be a scam or unreliable. This is the one that I've used and its trusted.

Please do not ask NUGSM questions anything related to Xperia bootloader unlocking, as they do not know much about it. They just provide the credentials and the tool.

MOD EDIT: Link Removed

Thread Created ( 01 February 2020 )

Updated Thread ( 11 December 2021 )

 

[snake218]

Interesting info, thanks for sharing. I always thought only sony could change bootloader status from unlock allowed: No to yes

 

[The montain]

Asking

Where can I buy the credit for S1tool and download the latest version S1 Tool?
I'd bought a xperia xz and found it needs to be unlocked by the tool to turn bootloader unlock allowed yes

 

[joseph168]

Yes where to buy the credit?

Sent from my [device_name] using XDA-Developers Legacy app

 

[joseph168]

I've bought an network locked Xperia 1 on ebay after getting the Xperia 5 and found out that it was hardlocked (0 unlock attempts left).

So I've looked around the internet to find a solution and the solution is called QUnlock (S1 Network Unlock tool)

Getting the software program is free but you have to pay credit in order to work. About £20 (You pay via mobile phone repair shop websites) then they will give you username and password to connect to the S1 server.

So I did that, connect my phone into flash mode and boom my Xperia 1 is network unlocked after it's been hardlocked.

So I've curiously checked the bootloader status and surprised to find out it has changed No to Yes.

It still amazes me because all these years, we were told that it was a permanent status. Sony website so called helpers are absolutely useless and clueless.

Hello friend, may you let me know where to purchase the credit of s1 tool?

Sent from my [device_name] using XDA-Developers Legacy app

 

[MrCooper95]

Hello friend, may you let me know where to purchase the credit of s1 tool?

NUGSM website

https://nugsm.com/product/sony-xperia-cable-unlock-0-counter-supported/

 

[joseph168]

Do you know after unlock bootloader, could we flash and concert to internal firmware?

 

[TrustAugustus]

Hello. My phone is 802SO and it was SIM unlocked but bootloader locked (set to NO) I used the website provided here in this thread and as result it is now switched to YES. Thanks a lot!

 

[MrCooper95]

Hello. My phone is 802SO and it was unlocked but bootloader locked (set to NO) I used the website provided here in this thread and as result it is now switched to YES. Thanks a lot!

Great news and glad to help you out, I wasn't so sure if this tool will only work on a SIM locked phone to unlock the bootloader. But you confirmed that it works in SIM unlocked state, so that's some good news.

 

[Ben Ling]

Hello. My phone is 802SO and it was unlocked but bootloader locked (set to NO) I used the website provided here in this thread and as result it is now switched to YES. Thanks a lot!

hi, any idea this will work on Docomo Xperia XZ / AU Xperia X Performance ? And did you paid 23 pounds to unlock a device ?

 

[TrustAugustus]

I did pay. You can download the software anytime, however you need a valid username and password to start the process. That's what you buy from the website. Got the the information within 24 hours. Windows thinks it's virus. It's not. Just temporarily disable defender for the download folder

As for whether or not it will work for your device:.I think it would. At least that's the impression I got when I emailed customer support. No guarantees from me, however :laugh:

 

[MrCooper95]

hi, any idea this will work on Docomo Xperia XZ / AU Xperia X Performance ? And did you paid 23 pounds to unlock a device ?

Yes it should work on those devices, the tool supports devices from 2013.

 

[riadjb1005073]

Xperia Z5 bootloader status no to yes

I have got a new Xperia Z5 SOV32 a few month ago. It was SIM unlocked but bootloader status was "no". Finding this thread I have bought qunlock tool from nugsm site, Then tried it to make bootloader status no to yes. After successful work done I have checked bootloader status converted to "Yes". Now I am using Lineage OS on my Xpeia Z5. Totally amazing.......

 

[Pusyneko79]

Nice. THanks

 

[firstchanel]

But can you unlock the bootloader after it change from "no" to "yes" ?

 

[betacrypt]

NUGSM website

https://nugsm.com/product/sony-xperia-cable-unlock-0-counter-supported/

I've got the Japanese model of the Xperia X Compact, with bootloader set to "No" in the service menu. Your method totally worked, after buying the item you linked I was able to unlock the phone using the S1 tool. Bootloader unlocked now shows "Yes". Thanks!

 

[techyrock]

Okay so after bootloader unlock says yes is it still unlockable though someone tried? I have been out of game though I have unlocked a few Xperia Z devices in past and as I recall the method was to enter your IMEI on official bootloader unlock page and they were to send you a code or smth for adb might be mixing up because I think my LG's had same method so my question is after entering imei on sony site they allow it automatically?

 

[&(*)]

I've got the Japanese model of the Xperia X Compact, with bootloader set to "No" in the service menu. Your method totally worked, after buying the item you linked I was able to unlock the phone using the S1 tool. Bootloader unlocked now shows "Yes". Thanks!

@betacrypt
Can you provide a copy of the software? Have an XZs I would like to fully unlock as it is already network unlocked. Please post on Gdrive or Mega if you can.

 

[&(*)]

I've bought an network locked Xperia 1 on ebay after getting the Xperia 5 and found out that it was hardlocked (0 unlock attempts left).

So I've looked around the internet to find a solution and the solution is called QUnlock (S1 Network Unlock tool)

Getting the software program is free but you have to pay credit in order to work. About £20 (You pay via mobile phone repair shop websites) then they will give you username and password to connect to the S1 server.

So I did that, connect my phone into flash mode and boom my Xperia 1 is network unlocked after it's been hardlocked.

So I've curiously checked the bootloader status and surprised to find out it has changed No to Yes.

It still amazes me because all these years, we were told that it was a permanent status. Sony website so called helpers are absolutely useless and clueless.

So this works on Simlocked phones too?

 

[MrCooper95]

So this works on Simlocked phones too?

https://www.reddit.com/r/SonyXperia/comments/exiyp6
The link is in my Reddit thread page.