topic Re: Bootloader unlock allowed:NO in Tablets

Bootloader unlock allowed: No

Jo1956 — Sun, 18 Oct 2015 22:44:26 GMT

We recently bought a Xperia Z4 Tablet. The service menu says Bootloader unlock allowed: No and I assume the usual procedure to open the bootloader did not work because of this. What can I do to change Bootloader unlock allowed: No to Bootloader unlock allowed: Yes? We need root access for the device. It is a university device for field work and the decision for SONY was because of the good support for developers. Without root the tablet is of little use. Any suggestions? Thanks in advance! Jo

Re: Bootloader unlock allowed: No

Uliwooly — Sun, 18 Oct 2015 23:19:41 GMT

Nothing, your carrier / network, requested the bootloader to be locked and there's nothing that can be done, other that replacing the motherboard, which will cost almost as much as a new device.

On a side note, why do you want to unlock the bootloader?

Re: Bootloader unlock allowed: No

Uliwooly — Sun, 18 Oct 2015 23:35:27 GMT

Just realized something, the tablet belongs to the university and unlocking the bootloader will void any warranty also some apps and services will no longer work, and the DRM keys will be gone forever.

This part it's my opinion, I can't see any reason to unlock the bootloader other than use the tablet in a way that the University doesn't want you to use it, the solution buy an unlock tablet and you'll be able to unlock the bootloader, but do tell us why is it necessary to unlock the bootloader and or root the device?

@Jo1956

Re: Bootloader unlock allowed: No

Jo1956 — Mon, 19 Oct 2015 16:36:04 GMT

Thank you for the clarfication. I did not get the device through a phone company and there is no SIM lock. May be it would have been better just to have the WiFi version of the Z4 without LTE.

Why root?

To access the VPN (cisco) of the university a proxy needs to be used. I did not find a working (non-root) app yet which can do this. Any suggestions since rooting the device is no option because of the looked boot loader?

Re: Bootloader unlock allowed: No

steamer360 — Mon, 04 Jan 2016 02:28:06 GMT

To be honest Uliwooly, it isn't your business why anyone should want to root or unlock their bootloader. It is entirely their decision.

On a bit of a tangent, I can just see the absolute that will ensue when Sony decides to shut down its mobile division, leaving all of these "bootloader unlock allowed: no" devices any way to update to the latest most secure version of Android. To me, hardwiring a bootloader lock into a supposedly developer friendly device is completely moronic, and is definitely not "developer friendly" as Sony claims themselves to be.

Also, I would rather have someone who works for Sony answering these "bootloader unlock" threads, as they probably have a better understanding of the process and limitations than you, Uliwooly.

Re: Bootloader unlock allowed: No

Lord_viridis — Mon, 04 Jan 2016 12:36:21 GMT

Point uliwooly was correctly making...
It's sod all to do with Sony, it is the network or vendor that has requested the loader be locked.

Re: Bootloader unlock allowed: No

Jo1956 — Tue, 05 Jan 2016 16:10:14 GMT

I actually decided for Sony because of the good support for developers which I read in other forums. I like to control my devices myself, e.g. by using, cyanogenmod. The divice is not a branded device. It is a totally SONY issue and I am too would like to hear directly from SONY why they decided to lock the device.

Re: Bootloader unlock allowed: No

Lord_viridis — Tue, 05 Jan 2016 22:10:23 GMT

You purchased it direct from Sony?

Re: Bootloader unlock allowed: No

Jo1956 — Wed, 06 Jan 2016 18:28:58 GMT

Hi Viridis,

not directly from Sony but through a harware vendor. No mobile phone company is involved and there is no branding.

Re: Bootloader unlock allowed: No

cchristofis — Thu, 14 Jan 2016 06:57:40 GMT

I had the same issue with the locked bootloader. Have you got the "my Xperia" app enabled? If so, try to disable it and enter the Service Info to check the bootloader unlock status. Mine has changed to "Yes". I actually managed to fastboot a custom img file but I can not enter recovery mode in order to install superSU.

Re: Bootloader unlock allowed: No

Jo1956 — Thu, 14 Jan 2016 16:24:42 GMT

Hi cchristofis,

thank you for this valuable advise. Getting SU to work would be essential for my problem though. The CISCO android client cannot configure proxies. Without this, no VPN :-(. Anyway, thanks for your support. Getting the bootloader unlocked is the first step. Will try it out.

Re: Bootloader unlock allowed: No

Jo1956 — Tue, 19 Jan 2016 14:52:46 GMT

In fact, deactivating "my Xperia" delivers

Bootloader unlock allowed: Yes

after entering the service menue with *#*#7378423#*#*

Re: Bootloader unlock allowed: No

ammen99 — Thu, 17 Nov 2016 06:05:25 GMT

I know it's an old thread, but can you tell me how you disabled "my xperia"?

Bootloader unlock allowed:NO

ammen99 — Thu, 17 Nov 2016 06:15:31 GMT

Hello!

I have recently bought my xperia m4 aqua from my carrier(Telenor Bulgaria). I tried to unlock bootloader, but fastboot oem unlock(with the code provided from sony site) gave me command not allowed(I've checked enable oem unlocking in developer settings). Then I checked and in Service Info it said "bootloader unlock allowed: no" . After reading in internet they said that is because carrier locked the device, but I wrote an email to my carrier and they said they haven't done such a thing. So this means it has been locked by sony, not my carrier. What can I do now to unlock bootloader? I tried flashing ftf for Switzerland via FlashTool, but status is the same.

Re: Bootloader unlock allowed:NO

Uliwooly — Thu, 17 Nov 2016 06:38:40 GMT

The answer is in the first page

http://talk.sonymobile.com/t5/Xperia-Z4-Tablet/Bootloader-unlock-allowed-No/td-p/1052106

ammen99

Bootloader unlock: no to yes

ammen99 — Mon, 03 Jul 2017 17:28:26 GMT

Hello, I know many threads exist with the same problem. However, my question is different. It is said that the operator can decide whether to lock bootloader. Now, I contacted them and they said they don't do such things, so sony has locked the bootloader for unknown reasons. Now, my contract has ended, so even if my carrier had locked the phone, I should be able to unlock it. I found this thread(which is too old now) - https://forum.xda-developers.com/xperia-u/general/dev-reloading-kernel-rebooting-t2053466 There have been guys who have managed to solve the dreaded "bootloader unlock allowed: no" problem, but for old devices. Now, I have xperia M4 aqua and wanted to ask, can the sony developers do something similar? From what I gathered from the thread the problem is a code which should be overwritten, but the key for generating this code is only available to sony developers. I am willing to do whatever is required, just please help me unlock my bootloader!

Re: Bootloader unlock allowed: No

zoohunter — Sat, 04 Nov 2017 18:53:18 GMT

lol everything is about this app "my xperia" just disable it there nothing to do with carrier or sony
here how to do
thanks for the guy who mentioned about that app he is a genies i was looking for hours but didnt thought about inter app

http://www.stechguide.com/disable-protection-xperia-sony-devices/

Re: Bootloader unlock allowed: No

able2doit — Wed, 22 Nov 2017 10:12:40 GMT

Tried this on my M4 Aqua: this protection was never enabled. I enabled and then disabled it. Still shows Rooting Status unavailable.

Re: Bootloader unlock allowed: No

Penny666 — Mon, 03 Sep 2018 17:51:10 GMT

Of course it can be changed.

How to change it is probably a very closely guarded secret because they want you to buy the latest phone.

They update the older phone with bloatware so your internal storage fills up and to use the latest apps the only option you are provided is to upgrade.

To get rid of the bloatware you need to root your phone and flash the bootloader. If the bootloader is locked it is only a matter of hacking it. You have the hardware in your hand so it is possible...

Re: Bootloader unlock allowed: No

Uliwooly — Tue, 04 Sep 2018 00:43:46 GMT

@Penny666

I understand that you might assume that, but that's not accurate; The only way to do so is to replace the motherboard, which will cost almost the same as a new device. Let's not spread misinformation, keep it friendly, constructive and helpful.