Hi there,
So I am a bit confused, but mostly I am curious... So I have a Sony Xperia Z4 Tablet (SGP771), I bought it off ebay pre-owned and for awhile I have been curious about rooting this device (mainly to block ads and remove unwanted and unremoveable content [ie Facebook] whilst still using stock android, but rooted). But for awhile now I have known that my device in the service\configuration menu has said 'Bootloader Unlock Allow: No' which has excluded me from what feels like everything available in terms of modifying the system to actually be rooted. The device is network locked to O2 UK, which I also assume the device is network restricted in relation to the bootloader also.
So I am confused because some threads have said about unlocking a locked bootloader, whilst most have clearly stated that their modification is not for my device (After having the bad bootloader message after all). So my question is, could someone tell me what actually is available (If anything at all) For me to root this device?
What I have learnt so far is that if I want to change the 'Bootloader Unlock Allowed: No' I would have to switch the motherboard with another one (Which is clearly an extremely expensive process and not something I would want to do). Other than that I would have to wait for an exploit, But I am not sure if there is one available (Yet?) which brings me to my earlier question. Otherwise I would have to continue to use the unrooted stock android, which I dont really have any issue with because I would definitely still root it and use stock if that was available to me (Blasted bootloader rejection).
I would really apprechiate a response on this and thanks for reading XD
I would contact o2 and see if they can help.
Maybe SONY (doubt they will do it) or a SONY repair center (third party).
Replacing the bootloader should be doable in software.
No solution to Xperia Z4 Tablet Locked Bootloader
Hello, I got the same model locked to O2 UK as well and as far as I know there's still no solution to that problem, ie changing the rooting status to YES or rooting the device on a locked bootloader like we all rooted previous Xperia devices. O2 requested Sony to lock the bootloader on purpose. There are many reasons for this. One of them is, O2 doesn't want anyone to change the IMEI of their device if it gets blacklisted, for example. Of course Sony (Service Centre) can unlock it but I doubt we find a Sony member of staff who will risk losing their job for doing so. However, there's a way of uninstalling unwanted apps (bloatware) without root, but this method uninstalls the bloatware for the current user only. So basically if you have several user accounts, you'll have to uninstall those apps as many times, and also keep in mind that the operation is not reversible. So the only way to restore those apps is by factory-resetting the tablet which leads to wiping all the user-data. That method is done via a PC and you need to install, I think, Android SDK as well as Sony drivers. The full guide can be found here
https://www.xda-developers.com/uninstall-carrier-oem-bloatware-without-root-access/
Again, this is not reversible unless you factory-reset the tablet.
If I ever find a solution, or a renegade Sony guy lol, I'll let you know.
Related
I bought this tablet 2 months ago in our local t-mobile. And everything was fine until 2 weeks ago when it suddenly started loosing gsm signal.
At first i thought it had something to do with me rooting it. So i tried repairing it 2 times but with no luck. After that i tried downgrading to 4.1.2 and that didn't work either.
So basically i can be online (surfing,downloading etc.) for few minutes before it drops gsm signal (no signal icon in statusbar) and after few minutes it comes back and then it drops again...
I'd like to know if it can be fixed without taking it to nearest sony repair service. Did anyone encounter similar problem and manage to fix it?
btw bootloader is locked (unlock allowed: no) so flashin another kernel/ROM is out of the question...
wh15tler said:
I bought this tablet 2 months ago in our local t-mobile. And everything was fine until 2 weeks ago when it suddenly started loosing gsm signal.
At first i thought it had something to do with me rooting it. So i tried repairing it 2 times but with no luck. After that i tried downgrading to 4.1.2 and that didn't work either.
So basically i can be online (surfing,downloading etc.) for few minutes before it drops gsm signal (no signal icon in statusbar) and after few minutes it comes back and then it drops again...
I'd like to know if it can be fixed without taking it to nearest sony repair service. Did anyone encounter similar problem and manage to fix it?
btw bootloader is locked (unlock allowed: no) so flashin another kernel/ROM is out of the question...
Click to expand...
Click to collapse
Have you tried factory resting it ? Also you can unlock the boot loader just search xda im sure ive seen a guide somewhere ? i was going to say take it back to Sony as it might be a hardware problem but since you have rooted it your warranty has been voided...
N1NJATH3ORY said:
Have you tried factory resting it ? Also you can unlock the boot loader just search xda im sure ive seen a guide somewhere ? i was going to say take it back to Sony as it might be a hardware problem but since you have rooted it your warranty has been voided...
Click to expand...
Click to collapse
Well firmware flashing via SUS repair option usually does that for me.. but yeah, i tried factory reset as well. And about bootloader unlocking i've been searching for a guide ever since i bought it. No such luck... Apparently if it's "bootloader unlock allowed: NO", it's meant to stay that way. At least until someone finds a way around it.
I've got a vague idea about how does rooting work and that tells me if i did a complete wipe and flashed my tablet, how can they detect it?
I mean.. it's a complete reinstall, how are they supposed to know that the tablet was rooted on previous firmware if it currently isn't?
wh15tler said:
Well firmware flashing via SUS repair option usually does that for me.. but yeah, i tried factory reset as well. And about bootloader unlocking i've been searching for a guide ever since i bought it. No such luck... Apparently if it's "bootloader unlock allowed: NO", it's meant to stay that way. At least until someone finds a way around it.
I've got a vague idea about how does rooting work and that tells me if i did a complete wipe and flashed my tablet, how can they detect it?
I mean.. it's a complete reinstall, how are they supposed to know that the tablet was rooted on previous firmware if it currently isn't?
Click to expand...
Click to collapse
Well im no pro, but don't they have some kind of binary counter witch tells the manufactures the devices has been rooted ? i know that's how Samsung goes about identifying if the devices has been rooted... But Sony im not too sure, Also your theory does hold ground, if you clean install from the ground up then Sony shouldn't be able to tell, if the device has been rooted, also you do know that Sony have a guide on there website on how to unlock the boot loader ? Here check it out http://developer.sonymobile.com/services/unlock-bootloader/
N1NJATH3ORY said:
Well im no pro, but don't they have some kind of binary counter witch tells the manufactures the devices has been rooted ? i know that's how Samsung goes about identifying if the devices has been rooted... But Sony im not too sure, Also your theory does hold ground, if you clean install from the ground up then Sony shouldn't be able to tell, if the device has been rooted, also you do know that Sony have a guide on there website on how to unlock the boot loader ? Here check it out...
Click to expand...
Click to collapse
I know about that website. That's how i unlock every sony i come across that needs unlocking :laugh:
But it also says if the "Bootloader unlock allowed" is NO in service menu, then there is no hope for unlocking the bootloader. At least not officially.. until someone comes with a solution for that..
So i managed to get some extra details on that problem.
Apparently i can't get LTE signal anywhere. And when i get LTE, connection automatically drops.
Could it be that the LTE chip is faulty? Does that mean that i'll probably get another device... because somehow i doubt that theyll try to replace the motherboard
This is the first Huawei device I own and I was wondering, what are the consequences of unlocking the bootloader?
Would DRM be lost forever like in Sony Xperia phones?
And if they are lost, does any software on stock Huawei android OS stop working?
Please give as much detail as possible in your answers since I do not want to mess up my new phone.
Unlocking the bootloader permits you to modify entirely the system.
However it comes up that he puts you an annoying message saying that "this device cannot be trusted" EVERYTIME you restart your phone.
Even when you go to your stock or TWRP recovery, it always says this.
When you're rooted and you decide to relock your bootloader, it'll tell that your device is modified so it failed verification... so it's another message in your face !
You'll lose warranty it seems, you'll lose all your data, and DRM might be deleted too (due to the "factory reset lowlevel")
But there are no losses in functionality like on Sony devices. So in general, if you know what you're doing you won't run up against any problems.
I bought this phone because it looked neat and I thought Xperia phones had remote play for the ps4 but apparently this is not one of those ones for some stupid reason. I know that if you install magisk and a sony framework from a different Xperia phone youll be able to download those specific apps from the store and have them be compatible with your device. I tried unlocking the bootloader through OEM but they have no option for the code. I know the phone is new but I really want to tinker with it.
Seaverns said:
I bought this phone because it looked neat and I thought Xperia phones had remote play for the ps4 but apparently this is not one of those ones for some stupid reason. I know that if you install magisk and a sony framework from a different Xperia phone youll be able to download those specific apps from the store and have them be compatible with your device. I tried unlocking the bootloader through OEM but they have no option for the code. I know the phone is new but I really want to tinker with it.
Click to expand...
Click to collapse
I just checked Sony's bootloader unlock site and the X10 and X10 plus are now listed.
Odd. I see what you mean. When I tried it last weekend it gave me a code and I was able to unlock. Checking the site again just now, the "Submit" button stays grayed out. ¯\_(ツ)_/¯
It does mention "It will only be possible to unlock the boot loader for certain releases."
https://developer.sony.com/develop/open-devices/get-started/unlock-bootloader/
Hi all, any way to relock? I want to recover auto updates but trying flashtool doesn't work. I receive this:
"WARN - Your device cannot be relocked"
I've been trying to figure this out all morning and I was directed here.
Basically, I locked myself out of my phone and I am unable to unlock it. I cannot transfer data from computer to phone or phone to computer without unlocking it first. I cannot move or look at the data without unlocking it first.
I tried downloading the dr. fone unlocker, but that was incompatible with Xperia XA2. I did read the rooting guide, but I didn't see Xperia XA2 listed in the compatible phones section.
As far as I'm aware, this means no data or code can be transferred from computer to phone or phone to computer. Given that, I'm not sure how I could possibly remove the lock screen without losing data, but I'm hoping the tech geniuses on this forum can help. This is so far outside my realm of comprehension, I honestly do not know where to even start. Hopefully somebody else does.
After rooting my Z2 and backing up the TA partition, I've discovered that the bootloader is not unlockable (it's a Vodafone branded device).
Is there a nefarious way in which to bypass this? I understand that the whole point is to keep it locked, but it's an old enough device so I may have missed where it's possible.
Otherwise what are my options for an up-to-date custom rom? As indicated, I've already achieved root and have TWRP installed. I tried flashing Lineage via recovery but got an E: unknown command [log] error.
I'm in the same boat unfortunately. I bought a used phone that had Vodafone UK. It was marked as SIM-unlocked, and that seems to be true; the service info doesn't show any filled checkmarks nor counters in SIM lock information. However, bootloader seems to be locked forever - flashtool reports "Bootloader status : NOT_ROOTABLE" and phone's service menus also say that rooting status is "bootloader unlock allowed: no".
I wasn't even aware there are Sony phones that are not SIM-locked but are still boot-locked without any way to unlock.
I would really want to upgrade from Android 6 to at least 7 because there are some specific apps that work only from A7. Wondering if there is any custom ROM that would run on stock A6 kernel but with everything else from A7? It should be possible to install such a ROM even on a bootlocked device, right?
Since posting I've discovered some answers. The bad news is that, no, custom ROMs are limited without an unlocked bootloader.
The potentially good news is that you can pay for an aftermarket SIM unlock, which has the side effect of also allowing the bootloader to be unlocked.
I've not tried it myself, but do a search for "Sony cable unlock credits" for some leads.
Yea I also am stumbling upon this same news, in my city there are some shady areas so I will ask around and see if anyone is capable of doing it and will let you know.
So far my phone has bootloader locked, sim locked with 3 attempts left so I will work on unlocking those and then rooting the phone and digging deep after
Lets cross our fingers that somethings comes up
So far online , I find only old videos and outdated information, websites down and nothing else.
One thing is for sure, if your bootloader can be unlocked, you just go to sony official website and follow their instructions and its free and easy,
But if it says ""bootloader unlock allowed: no" then...lets see what can we do.
Hey I am willing to pay, why not if its going to unlock the bootloader 100%