Develop Bugs

[Q] jailbreak rt 8.1,possible?

still wondering how to jailbreak rt 8.1,seems that cdb no more works..

A jailbreak for 8.1 isn't possible yet.
Sent from my SCH-I535 using xda app-developers app that has now replied to millions of stupid questions

hjc4869 said:
still wondering how to jailbreak rt 8.1,seems that cdb no more works..
Click to expand...
Click to collapse
*sigh*. Use search, or even just open your eyes and read through the development and hacking section which is basically full of this single statement: "8.1 does not have a jailbreak yet"

SixSixSevenSeven said:
*sigh*. Use search, or even just open your eyes and read through the development and hacking section which is basically full of this single statement: "8.1 does not have a jailbreak yet"
Click to expand...
Click to collapse
Making a jailbreak is a complicated task. I'm working on it...
Melissa

surface rt 8.1 jailbreak
Myriachan said:
Making a jailbreak is a complicated task. I'm working on it...
Melissa
Click to expand...
Click to collapse
hello my name is mike clery I was wondering any info on a 8.1 jailbreak I really want to install legacy apps on my surface rt so if you can tell me anything its December 26 and still no info on it

Dude. Don't pester the devs. Don't post questions that have already been asked and answered over and over again. Don't, ever, ask for ETAs or similar concerning hacks like this. Leaving aside the simple fact that it's impossible to predict anything of that nature (and thus asking is simply useless and annoying spam), people on here are volunteers doing this stuff in our own time. You are not our boss, to ask for regular status reports or some such thing. It'll be posted when it's ready. No point asking for anything else.
There has been plenty of discussion regarding an 8.1 jailbreak. I get that you're new, but time was, new members of a community had the courtesy to observe, and emulate, the behavior of the older members of the community. At a minimum, check the forum rules... the very first of which is: Search before posting!

cameyo ? work with jailbreakoen surface rt ????
Have you guys heard about cameyo ?????
Its pre pacakge apps taht dont need to be installed to run.
download them and run them, wonder if we be able to use those apps after the RT is jailbroken? any idea ?
search for online . cameyo . com / public - (no spaces)
here is the link to hugh list of apps that can be downloaded as n exe file and run on any PC, offcourse not on rt . i tried. Anyone with a 8.0 surface RT jailbroken devce, wanna try and let us know if they are working ?

MrAsimOnline said:
Have you guys heard about cameyo ?????
Its pre pacakge apps taht dont need to be installed to run.
download them and run them, wonder if we be able to use those apps after the RT is jailbroken? any idea ?
search for online . cameyo . com / public - (no spaces)
here is the link to hugh list of apps that can be downloaded as n exe file and run on any PC, offcourse not on rt . i tried. Anyone with a 8.0 surface RT jailbroken devce, wanna try and let us know if they are working ?
Click to expand...
Click to collapse
Nope. Cameyo is for x86 not ARM and would need porting, as it is not open source that is not possible.

Possible alternitve?
Is is possible to just get a developer license on an rt device and then use your own signing certificate to sign some application (like audacity) then import the certificate into the trusted root authority list using certmgr.msc? If that worked then we could get something going that would work with few risk of problems. Also for anyone else who might find this useful, you can download a windows rt debugger and it has a built In kernel debugger (maybe could be used to jailbreak???).

... And we come full circle. @johndc7, thanks for your suggestion but did you really think that wasn't among the very first things we tried?
The requirement isn't that the binaries are signed. It's that they're signed by Microsoft. Your suggestion does actually work if the tablet is in Testsigning mode - which means, basically, treat any trusted signature as if it's a MS signature - but putting the tablet in Testsigning mode requires editing the BCD (Boot Configuration Database) and the SecureBoot feature prevents any modification to the SecureBoot flag in the BCD. We even have tried complex steps like exporting the BCD, enabling Testsigning on it, marking it read-only, and re-importing it. No dice. Feel free to experiment more yourself, though...
Oh, and as for kernel debug, that's definitely another way to disable the signature enforcement... and it's just as unusable as your last suggestion. Secure Boot blocks the Debug flags in the BCD. You don't need any special software to perform kernel debugging of RT - any build of kdb or windbg from the last few years can do it - but you do need to be able to put the tablet in debug mode to begin with. Again, if you find a way to do *that*, then that would be very valuable.

Another idea........
Hopefully this is something that is actually somewhat realistic..... I have been wanting to run audacity (mainly) on windows rt. Does anyone know if it would be possible to recompile it to run full screen in metro? Even though this method isn't really ideal, it would be something to temporally use instead of having nothing until somebody finds a better way of doing it. I understand that it probably wouldn't be able to be released to the windows store but a developer license could be installed to run it.

Well, at a bare minimum, you would need to re-write the entire UI. Metro apps don't (can't) use the standard Windows GUI frameworks, so any graphical app that isn't completely DirectX-based (which is to say, pretty much anything except games and command-line apps) will need to have their interface re-written.
Then there's the issue of things like getting it to work within the sandbox (you can largely work around the API restrictions, but the privileges issue is a problem) and, unless it is already possible to compile it under modern versions of Visual Studio (a lot of open-source software isn't), you would need to fix it for MSVC compatibility too.
Short version: Not practically.

Possible Alternative
I did find a folder on my RT device called "CodeIntegrity". The path is "C:/Windows/System32/CodeIntegrity". It contains drivers and stl files that I assume prevent the use of unsigned exes. Permissions that are not normally granted on the Surface are needed to disable the files, but if we could somehow do it maybe it would solve the problem?

GoodDayToDie said:
The requirement isn't that the binaries are signed. It's that they're signed by Microsoft.
Click to expand...
Click to collapse
Not exactly. They can be signed by any certificate listed in the kek or db and not listed in the dbx. So microsoft (though there are different signatures in rt 8.0 and rt 8.1) and the OEM, and any third party that made drivers that are used on the platform (at least in general). But those are just technical details and don't help find a solution all that much.

Windows 10 rom for LG's G3 variants - a possibility???

With the release of Xiaomi's Windows 10 rom, is there a possibility that this could be ported over to phones such as the LG G3 with the same chipsets, chips and ram??
Would definitely breath new life into the device and something i would be willing to donate for.

It would definitely be a possibility, but devs would have to be willing to put a lot of time and work into learning the structure of the new os and adapting it to the dissimilar hardware between the g3 and the mi4

I was guessing the same thing but the first emerging problem is the following (please correct me if I'm wrong, I'm here to learn):
when you extract this specific rom, you find out about 20 partitions (unlike other lumias)..and it's almost the same number of partitions that an android rom for xiaomi has.
So my guessing is: xiaomi's bootloader hasn't changed, it's the same for windows 10 mobile and for android. They build a rom (probably working on the NT kernel of windows) suitable for this specific device. Of course lg's devices manage the memory with a different partition scheme..so, if I haven't written wrong things (otherwise correct me), to make a port is necessary to have an in dept knowledge of window's kernel (a not so simple task since it's closed source) in order to change *at least* the partition scheme and to make it suitable with lg's bootloader. People who can manage with this task, as far as I know, are not too much..

what to do with my lumia 925?

i have an lumia 925 that i dont use anymore...and handed it over to my kid..but now he wants an android instead...(app gap!!) before i tried to install the testbulids of win 10 that was available to the phone...but it was to may things that did'nt not work. I wish that it was possible to install android on it
is there any "sharp" windows 10 bulid or anything to install on it nowdays that work all day?

You can use it as a photo camera, should be pretty good for that. But stay away from Windows 10, it's full of bugs and it will force you to use the new crappy Camera app.
Otherwise, sell it and buy an Android phone for your kid.

Hello. I am in the same boat as yours - a Lumia 630 user. I am using the latest 10586 build and it is as good as WP8.1. Just make sure you select Release Preview in windows insiders. Also do a hard reset after getting onto W10 to ensure all bugs and left over files are deleted.

wohoooo??? finally perhaps a new rom?
ohhh..i heard today that some "keys" leaked from microsoft that unlocks the bootloader...it says that now you could install any operationsystem on windows devices?? then perhaps we could install android in our 925's? or perhaps have a dualboot anything about this?
https://rol.im/securegoldenkeyboot/
http://www.idg.se/2.1085/1.663268/microsoft-lacka-windows-nyckel (swedish)

Lumia after factory reset and no updated Extra & Info Interop Unlock

Hi,
I reset my Lumia 535 and updated all apps exclude Extra & Info.
But Interop Tool L 78- 79 and S dont work with the last Registry Provider. Nothing to choice in the Provider option, but they are list under Provider in the tool. I dont can change the registy with them.
Which app work on 10.0.15063.1155 to full unlock?
Thanks

joke19 said:
Hi,
I reset my Lumia 535 and updated all apps exclude Extra & Info.
But Interop Tool L 78- 79 and S dont work with the last Registry Provider. Nothing to choice in the Provider option, but they are list under Provider in the tool. I dont can change the registy with them.
Which app work on 10.0.15063.1155 to full unlock?
Thanks
Click to expand...
Click to collapse
The same issue that I explained few months ago here in another thread, but didn't get an useful answer. I have a Nokia Lumia 920 device, and with many different builds of Win10m, either many builds of WinPhone 8 & 8.1 tried to modify Virtual Memory values, everytime following all kind of guides step by step correctly, but always failed to Interop Unlock my Lumia 920.
I tried to do it following guides that works with Registry Providers and without mentioning them, working with Interop Tool S, with Interop Tool L, with previous versions of them, with Custom PFD, with VcReg, ... with any of possible known tools &/or any version of them, but always failed.
Resuming, I don't know if those tools just works with counted and specific devices where the Lumia 920 is not included, if it is my own Lumia 920 that could have any kind of internal problem that I need to solve first (maybe flashing an specific ROM, unlocking/restoring Bootloader, erasing all and manufacture it again [hahahaha], ...), but I never get success with it.
__
In other way, I use to ask about the possibilities of get a dual boot or change OS on Lumia 920, after read that in few lower models were possible to run Android and install GRUB2 on them (what could give anyone the chance to select between 2 Operative Systems installed), and the typical answer is that "if you want android, just buy an android device" or "work on something like this is not relevant" or "is stupid to try it, because drivers of components and blablabla", and mostly answers with silence (no answer in months/years).
XDA is supossed to be a forum to try to collaborate by developing or helping those who develop or want to implement what others develop. But above all, developing things that could be a big challenge that we want to overcome, because after all, this is what did, does and will continue doing the XDA community the greatest dev community of internet; but with this kind of passive attitude and without any curiosity, (which are reflected in that kind of answers up related), doesn't help at all, and even less in the Windows section, so low and less advanced compared to Android, due to the lack of interest of the most of the great developers of this great family.
Recently I offered myself with my own device in another thread to work in something. Well, let's see in a future if I get any proposal or collaboration. Surely never.
__

Help needed to install Windows 10 for ARM32 for Nokia Lumia 2520 RT

Hi guys, can anyone help to install Windows 10 for ARM32 for Nokia Lumia 2520 RT tablet?

Same procedure as other devices but you will have to substitute the drivers with ones from the 2520 aside from qcpep which has to be replaced with an alternative one which I think came from the Lumina WoA project staff (From Lumia 930?). However, if your 2520 has been kept up to date with the latest patches under RT 8.1 then you won't be able to jailbreak it in order to use 15035

jwa4 said:
However, if your 2520 has been kept up to date with the latest patches under RT 8.1 then you won't be able to jailbreak it in order to use 15035
Click to expand...
Click to collapse
Hi JWA4 could you expand on this? Also is it the case for the surface RT as well (latest up to date version can't be jailbreaked) or just the 2520?

devinpatterson said:
Hi JWA4 could you expand on this? Also is it the case for the surface RT as well (latest up to date version can't be jailbreaked) or just the 2520?
Click to expand...
Click to collapse
The short version as I understand it is that Nvidia screwed up in users favor which makes the Tegra Surfaces immune to permanent effects of the jailbreak killing Windows RT updates. On these devices reversing the negative effects of theses updates is as simple as a factory reset.
Sadly with the Lumia 2520, Qualcomm did the job right and at present there is no going back if a jailbreak killer has ever been installed.
I will try to find the detailed explanation I read and post it here asap.

jwa4 said:
The short version as I understand it is
Click to expand...
Click to collapse
Thanks for taking the time to fill me in the 2520 Jwa4
jwa4 said:
I will try to find the detailed explanation I read and post it here asap.
Click to expand...
Click to collapse
That would be awesome if your able to locate the info in more detail

devinpatterson said:
That would be awesome if your able to locate the info in more detail
Click to expand...
Click to collapse
I was unable to find the explanation that I read but if I find it again I will post.
I could be wrong and there might be more to it but I think the general idea was that Nvida did not implement the mechanism that handles the revocation of previously issued certificates correctly whereas Qualcomm did. On a previously updated Lumia 2520 this prevents the Secure Boot Debug Policy from working because its certificate is no longer going to be valid on the device.

Telegram: Contact @L2520w10RT
4pda.ru
I installed Win 10 RT on Lumia 2520.
with any security updates! No problem.
But, I need help with drivers.

CageOff said:
Telegram: Contact @L2520w10RT
4pda.ru
I installed Win 10 RT on Lumia 2520.
with any security updates! No problem.
But, I need help with drivers.
Click to expand...
Click to collapse
How were you able to do this? I thought the Secure Boot issue stopped any other installations?

lord_melchett said:
How were you able to do this? I thought the Secure Boot issue stopped any other installations?
Click to expand...
Click to collapse
Go to Discord. I discuss all the sub-genes there. The system is not ready for public use. Testsign, secureboot and everything you need is there. No problem using Linux via grub uefi. It is much more difficult to find developers who will do this. And Tales about the impossibility of disabling Secureboot is just a fact of bygone days. The device is now free of these restrictions.
No touch, no modem, no BT, no audio, adreno 330 not work.
But yesterday qcpep and qcpepproxy did not work as expected.
Today they are working as expected.
I will start other hardware devices too. It just takes time.

CageOff said:
Go to Discord. I discuss all the sub-genes there. The system is not ready for public use. Testsign, secureboot and everything you need is there. No problem using Linux via grub uefi. It is much more difficult to find developers who will do this. And Tales about the impossibility of disabling Secureboot is just a fact of bygone days. The device is now free of these restrictions.
No touch, no modem, no BT, no audio, adreno 330 not work.
But yesterday qcpep and qcpepproxy did not work as expected.
Today they are working as expected.
I will start other hardware devices too. It just takes time.
Click to expand...
Click to collapse
Cool. So does everything work fine on Linux, just not in Windows 10? Having never used discord let me know where to find out. If I can dump any files to help let me know

CageOff said:
[URL unfurl = "true"] https://4pda.ru/pages/go/?u=https://t.me/L2520w10RT&e=103134199&f=https://4pda.ru/forum/index .php% 3Fshowtopic% 3Dst5135 [/ URL]
Ho installato Win 10 RT su Lumia 2520.
con eventuali aggiornamenti di sicurezza! Nessun problema.
Ma ho bisogno di aiuto con i conducenti.
Click to expand...
Click to collapse
Salve...mi potreste aiutare ad aistallare windows 10 oppure linux mine su nokia lumia 2520?

Salve ragazzi ... vorrei un aiuto per istallare windows 10 o linux mine su nokia lumia 2520 ... se è possibbile..grazie..questo forum e fantastico ... max

Do you have a guide to follow for this? I went to your Telegram site but all I saw was pictures.

i need help to install windows 10 rt on Nokia 2520

I know this device is so outdated and all, yet it'd be nice to get some use out of it. Anyone have a proper guide on how to accomplish what @CageOff was saying in order to bypass the security update patches and getting securebooot unlocked. I've tried so many different methods and gotten nowhere in my attempts to get working BOOTABLE USB media for 8.1. No guide clearly explains/points out that the Myriachan's Jailbreak is the exploit specifically intended for the Qualcomm Nokia Lumia 2520 to get the test mode exploit going (if it works). Longhorn obviously doesn't work as it can't install Golden Keys. I went to the Telegram group @CageOff mentions, but there is no way to talk to the person nor any clear info about how he managed to dualboot win10 arm/win8.1 arm. If anyone could shed some light on me here, It'd be much appreciated.

hugoBOSS1981 said:
I know this device is so outdated and all, yet it'd be nice to get some use out of it. Anyone have a proper guide on how to accomplish what @CageOff was saying in order to bypass the security update patches and getting securebooot unlocked. I've tried so many different methods and gotten nowhere in my attempts to get working BOOTABLE USB media for 8.1. No guide clearly explains/points out that the Myriachan's Jailbreak is the exploit specifically intended for the Qualcomm Nokia Lumia 2520 to get the test mode exploit going (if it works). Longhorn obviously doesn't work as it can't install Golden Keys. I went to the Telegram group @CageOff mentions, but there is no way to talk to the person nor any clear info about how he managed to dualboot win10 arm/win8.1 arm. If anyone could shed some light on me here, It'd be much appreciated.
Click to expand...
Click to collapse
Myriachan is not specifically intended for Qualcomm devices, its just that it can't be permanently patched against but this won't help you for 15035.
I don't have a 2520 but from what I can tell CageOff seems to have booted 15035 on a 2520 but the details are getting lost in translation and a writeup doesn't seem to be forthcoming. From what I can gather even though he has booted 15035 on his 2520, he has done so without the installation of the QCPEP driver and without this driver virtually nothing else will work.
On QCEP - BetaWiki.net
This build does not support the Nokia Lumia 2520 Qualcomm Power Engine Plugin driver. Loading a newer driver for the Snapdragon 800 is mandatory.
Click to expand...
Click to collapse
The newer driver I believe is harvested from the LumiaWOA project, specifically taken from the Lumia 930 package. It could be worth looking at how WFAv7_Installer installs 15035 on a 930? It might shed some light on the driver ordering, as far as I've been told Qualcomm stuff has to be dealt with in a certain order.
Before you put too much time in to this though remember 15035 is about as much use a chocolate teapot so remember its just for fun. If you spend a week figuring it and actually get it all working in the hope of making an ex-RT device useful you are going to be a little disappointed at the end of it.

jwa4 said:
Myriachan is not specifically intended for Qualcomm devices, its just that it can't be permanently patched against but this won't help you for 15035.
I don't have a 2520 but from what I can tell CageOff seems to have booted 15035 on a 2520 but the details are getting lost in translation and a writeup doesn't seem to be forthcoming. From what I can gather even though he has booted 15035 on his 2520, he has done so without the installation of the QCPEP driver and without this driver virtually nothing else will work.
On QCEP - BetaWiki.net
The newer driver I believe is harvested from the LumiaWOA project, specifically taken from the Lumia 930 package. It could be worth looking at how WFAv7_Installer installs 15035 on a 930? It might shed some light on the driver ordering, as far as I've been told Qualcomm stuff has to be dealt with in a certain order.
Before you put too much time in to this though remember 15035 is about as much use a chocolate teapot so remember its just for fun. If you spend a week figuring it and actually get it all working in the hope of making an ex-RT device useful you are going to be a little disappointed at the end of it.
Click to expand...
Click to collapse
That's definitely worth looking into in regards to the "WFAv7_Installer". I just tried the WOA Deployer v2.7.1 and it seems it could be of great use in getting Win 10/11 arm onto this device. Of course, if one can figure out how to access/enter a Mass Storage mode first.
I also read in another forum article that the IOT versions of Windows seems to be more useful for this device, rather than trying to get the standard Pro/Home editions. They also mentioned that one may need to apply the drivers from the original Win 8.1 RT in order to get all of the devices hardware working though. I would personally like to give this a try, but I can't seem to get to the point of being able to install Win 10 build 15035 onto my device. I can't enable test-signing mode, nor disable bootloader with any of the jail breaks available. I get the error code 0x000000000000d (not sure i put the correct amount of zero's there), which seems to give no existing info on the net for that error code, only a few forum posts regarding the variant to that code which ends in "f" which seems to be related to the Surface 1/2 devices.
I know I can format the eMMC properly via command prompt, diskpart, and dism (for Win 8.1 RT), then disable BitLocker (even though C:\ still says Bitlocker Encrypted). Yet, I just can't get the Win 10 media to work which i assume is due to secure boot. Does it make any difference if I'm using the install.wim or install.esd versions of the media?

hugoBOSS1981 said:
That's definitely worth looking into in regards to the "WFAv7_Installer". I just tried the WOA Deployer v2.7.1 and it seems it could be of great use in getting Win 10/11 arm onto this device. Of course, if one can figure out how to access/enter a Mass Storage mode first.
Click to expand...
Click to collapse
WOA Deployer is specifically for deploying WoA on the Lumia 950 & 950 XL, it doesn't support Windows 10 15035 or ARM32 devices like the Lumia 2520.
Windows 11 is out of the question, only small parts of it were built for ARM32 (nothing close to a full client) and the bits that were built won't work with this SoC. I don't believe WFAv7_Installer ever had the 2520 in mind, I only suggested it because how it prepares an image for some of the Lumia phones might shed some light on how an image would need to be prepared for the 2520.
hugoBOSS1981 said:
I also read in another forum article that the IOT versions of Windows seems to be more useful for this device, rather than trying to get the standard Pro/Home editions. They also mentioned that one may need to apply the drivers from the original Win 8.1 RT in order to get all of the devices hardware working though.
Click to expand...
Click to collapse
That's going to come down to what you define as useful but personally I don't see any point in running IoT on a tablet. At the time of writing only the 15035 client build is available and that's now over five years old. Drivers taken from the RT 8.1 recovery image would be required along with the replacement PEP driver mentioned previously but its possible not all drivers will be compatible with IoT.
hugoBOSS1981 said:
I would personally like to give this a try, but I can't seem to get to the point of being able to install Win 10 build 15035 onto my device. I can't enable test-signing mode, nor disable bootloader with any of the jail breaks available. I get the error code 0x000000000000d (not sure i put the correct amount of zero's there), which seems to give no existing info on the net for that error code, only a few forum posts regarding the variant to that code which ends in "f" which seems to be related to the Surface 1/2 devices.
Click to expand...
Click to collapse
To enable test mode you would need either Golden Keys or the Myriachan jailbreak, unless you are lucky then the device you have might not be capable of using Golden Keys anymore. If I'm remembering correctly the Myriachan jailbreak is only useful for running third party applications under RT 8.1 and wouldn't assist in running another OS.
hugoBOSS1981 said:
I know I can format the eMMC properly via command prompt, diskpart, and dism (for Win 8.1 RT), then disable BitLocker (even though C:\ still says Bitlocker Encrypted). Yet, I just can't get the Win 10 media to work which i assume is due to secure boot. Does it make any difference if I'm using the install.wim or install.esd versions of the media?
Click to expand...
Click to collapse
Windows 10 15035 isn't available as an ESD, you would need to take the 15035 installation files and properly add the drivers to boot.wim, install.wim and winre.wim before copying them to USB and attempting the installation. CageOff seems to have installed 15035 without the use of Golden Keys but even when booted the installation of 15035 is useless because he has not added the PEP driver.
A clean 15035 if you don't have one (No drivers):
Windows 10 Enterprise Build 15035 ARMv7 : Microsoft : Free Download, Borrow, and Streaming : Internet Archive
Windows 10 Enterprise Build 15035 ARMv7
archive.org
Lumia 2520 Drivers (Extracted from RT 8.1 Recovery Media):
Lumia_2520_Drivers.zip - AnonFiles
anonfiles.com
Replacement qcpep / qcpepproxy from Lumia project for 15035:
Lumia_930_qcpep.zip - AnonFiles
anonfiles.com
I don't know much at all about the 2520 and pretty much anything I say about it could be wrong