Is it possible to use custom ROMs without an unlocked bootloader?
Theoretically, yes. I did on my previous phone. A dev would have to cook a Rom with the stock kernel, etc.
tribalartgod said:
Theoretically, yes. I did on my previous phone. A dev would have to cook a Rom with the stock kernel, etc.
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could you explain a little more?
because i tried running cyanogenmod on my device but it showed up a security error, which i read somewhere is cause by a locked bootloader
dhruvbatra205 said:
could you explain a little more?
because i tried running cyanogenmod on my device but it showed up a security error, which i read somewhere is cause by a locked bootloader
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Basically, when a ROM is made... It's either made from 100% scratch, or it's made with another ROM as it's base. For example...Paranoid Android used to be CM based... Meaning it used certain aspects of the CM ROM, but with the look/feel/features of it's own. So for this to work ona locked bootloader, the ROM cooker would have to use Stock as their base, and build up from there... I'm not a developer, so I can't go into extreme detail on this, I'm sorry.
But to properly answer your question... Yes, it is possible to do this... Will it happen?? Probably not, unless someone takes the time to port something over.
You got a security error, because CM changes things from the Stock base... So since it's not build from stock, it won't work unless the bootloader is unlocked, OR unless someone rebuilds it with the stock ROM as it's base.
For anyone else reading this... I hear MIUI is relatively easy to port onto a stock base...
okay. last thing. what 'changes' does the locked bootloader detect that it shows up a security error?
Boot.img has to be signed by LG. Not signed= security error. There is probably more to it than that but that is my understanding.
Sent from my LG-P769 using xda premium
Tablechair said:
Boot.img has to be signed by LG. Not signed= security error. There is probably more to it than that but that is my understanding.
Sent from my LG-P769 using xda premium
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So, do you think it might not be an unnecessarily tough and time consuming job to port cyanogenmod in such a way that it would work on a locked bootloader device?
dhruvbatra205 said:
So, do you think it might not be an unnecessarily tough and time consuming job to port cyanogenmod in such a way that it would work on a locked bootloader device?
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It's do-able... But may be pretty time consuming... If you have never ported before, I suggest starting with MIUI v4. From what I read, it's relatively easy. I know for a fact that MIUI, if ported properly, will work on locked bootloader, as my previous phone ran it with locked bootloader.
There is a workaround here. http://forum.xda-developers.com/showthread.php?t=2099238
Artas and markolino had CM9 working on locked bootloader P760. Anyone interested in trying to port a ROM this way should definitely check out that link.
Sent from my LG-P769 using xda premium
I have a doubt reguarding bootloader unlocking.
It is possible to flash custom recovery using fastboot, and then flash any rom using recovery.
Then is there any need for boot loader unlocking specially??
I flashed recovery using fastboot mode without any special steps of unlocking bbootloader.
And plz tell what is the good way of flashing recovery- through stock recovery or through fastboot mode or terminal or certain tools(mtk)
I have rooted my phone oneplus x using kingroot.... It is rooted.... I have checked it with root checker.... I have installed TWRP on my phone too... N i want to flash the paranoid android 6.0.1 on it.... I have downloaded it along with gapps package........ Now i want to flash ut but i am in doubt wheather it will flash properly because i haven't unlocked my bootloader..... So will i be able to flash this rom without unlocking my phone???
Related
I seen some people say something about bootstrap recovery but i was curious to know like what roms will work or if it really is possible to flash a custom rom while the boot loader is locked
Custom roms are possible, custom kernel is not. Imperium, mof3.5, rocko, homebase, and jokerskinny are your options. Mof3.5 is the only one still in active development.
Sent from my CM9ed MoPho!
I've done some reading and am still unclear.
So, if I want ICS and still keep my 4G I would:
1) Unlock bootloader
2) Install CM9, make nandroid backup
3) Install custom ROM
4) Relock bootloader
I am certain this has probably been covered somewhere and apologize for asking such a goofy question.
psychotropic said:
I've done some reading and am still unclear.
So, if I want ICS and still keep my 4G I would:
1) Unlock bootloader
2) Install CM9, make nandroid backup
3) Install custom ROM
4) Relock bootloader
I am certain this has probably been covered somewhere and apologize for asking such a goofy question.
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If you want ICS and 4g you for cant have it. In order to retain 4g the only rom you can use is a locked rom as already stated there are several in the development section.
4g =locked rom.
Sent from my MB855 using xda app-developers app
Hi. I basically don't won't to unlock because you have to give your details to Sony which means voiding the warranty.
Can I still run custom (AOSP based) ROMs?
My Gnexi said:
Hi. I basically don't won't to unlock because you have to give your details to Sony which means voiding the warranty.
Can I still run custom (AOSP based) ROMs?
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No. Custom ROMs require custom kernels which need unlocked bootloader.
However, the stock Sony ROM is pretty good.
GretaLewd said:
No. Custom ROMs require custom kernels which need unlocked bootloader.
However, the stock Sony ROM is pretty good.
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"Pretty good" is not good enough for me. Maybe it's possible to somehow "patch" to bootloader so it won't check kernel at startup?
Since with root access you can probably overwrite anything (right)? And the bootloader already knows to allow booting modified kernels when state=unlocked.
Maybe one of the master developers here can hack the bootloader to make it behave as unlocked?
Ist it possible after modification to set the SGP311 back to 100% original ?
I rooted my phone and now I have CWM will there be a day when I could flash Roms to this device?? I really hope so. This device would complete crap if there is no way of doing that.
dvella21 said:
I rooted my phone and now I have CWM will there be a day when I could flash Roms to this device?? I really hope so. This device would complete crap if there is no way of doing that.
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If you are interested in CyanogenMod ROMS then there are nightlies available for our phone with Android 4.3.
dvella21 said:
I rooted my phone and now I have CWM will there be a day when I could flash Roms to this device?? I really hope so. This device would complete crap if there is no way of doing that.
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You have to unlock your bootloader to flash a custom rom. Sony makes unlocking your bootloader easy: http://unlockbootloader.sonymobile.com/
Man you unlock bootloader you can Lock bootloader. It's so easy and so simple. What's wrong with the people
I lock/unlocked my bootloader I think around 16 times !! Aaaand what ? You don't like it custom lock your device back and flash stock.
Hi, sorry but I'm confused reading about rooting in regards to DRM keys, TA partitions and what method works with the latest firmware.
I've upgraded my firmware to the latest generic. 314 AU firmware and my phone came with the bootloader unlocked.
I want to root now and am confused as to whether I will
1.lose warranty
2.be able to restore to factory if I need to send it back for repairs
3.lose anything else
4.what method I need to use to get root with my firmware.
Thanks
Sent from my D6503 using XDA Free mobile app
Do you mean that your phone's bootloader is unlockable (i.e. can be unlocked if you wish) or do you mean that it has already been unlocked?
You'll lose warranty only if the bootloader has been unlocked. If you just root the phone (and keep the bootloader locked), then you still have your warranty.
You can restore to factory simply by using the repair function in PC Companion.
Root will not cause you to lose anything. But unlocking the bootloader will remove the DRM keys and TA partition.
Use the rootkitXperia tool to root your phone.
Sorry, I meant the bootloader is allowed to be unlocked, it isn't unlocked yet.
Do I even need to unlock it seeings as you can get root without unlocking it?
Sent from my D6503 using XDA Free mobile app
kotton666 said:
Sorry, I meant the bootloader is allowed to be unlocked, it isn't unlocked yet.
Do I even need to unlock it seeings as you can get root without unlocking it?
Sent from my D6503 using XDA Free mobile app
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you do not need to unlock your bootloader for many things
-root
-recovery
-stock based roms
-mods
-root apps
-etc
flashing a custom kernel or non stock based rom requires you to unlock your bootloader, as flashing a kernel or non stock based custom rom will brick your device
Envious_Data said:
you do not need to unlock your bootloader for many things
-root
-recovery
-stock based roms
-mods
-root apps
-etc
flashing a custom kernel or non stock based rom requires you to unlock your bootloader, as flashing a kernel or non stock based custom rom will brick your device
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Ahh ok. I essentially want root for a couple of mods and root apps as well as ad blocking.
So if I decide in the future to try a custom rom then I should unlock the bootloader before doing so?
Sent from my D6503 using XDA Free mobile app
kotton666 said:
Ahh ok. I essentially want root for a couple of mods and root apps as well as ad blocking.
So if I decide in the future to try a custom rom then I should unlock the bootloader before doing so?
Sent from my D6503 using XDA Free mobile app
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Right. But before unlocking bootloader make sure to backup your TA partition so your DRM keys and other essential files needed for warranty is still intact. You can use TA Backup tool to unlock and re-lock BL.
Re-locking bootloader will bring back your warranty but once you unlock your bootloader and you did not back it up, you cannot bring back and you'll permanently loose warranty.
DrearierJester1 said:
Right. But before unlocking bootloader make sure to backup your TA partition so your DRM keys and other essential files needed for warranty is still intact. You can use TA Backup tool to unlock and re-lock BL.
Re-locking bootloader will bring back your warranty but once you unlock your bootloader and you did not back it up, you cannot bring back and you'll permanently loose warranty.
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Thanks for the reply guys, much appreciated. It's a lot clearer for me now.
Sent from my D6503 using XDA Free mobile app
Envious_Data said:
flashing a custom kernel or non stock based rom requires you to unlock your bootloader, as flashing a kernel or non stock based custom rom will brick your device
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I assume you mean, may rather than will?
ghostofcain said:
I assume you mean, may rather than will?
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i mean Will instead of may.
flashing a custom kernel or non stock based rom to a device with a locked bootloader will brick your device.
english isnt my strong suit, i know that "may" isnt a solid word, will is more solid implying that it will always happen...
Envious_Data said:
i mean Will instead of may.
flashing a custom kernel or non stock based rom to a device with a locked bootloader will brick your device.
english isnt my strong suit, i know that "may" isnt a solid word, will is more solid implying that it will always happen...
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Flashing a custom kernel on a locked bootloader will fail, not brick your device.
ghostofcain said:
Flashing a custom kernel on a locked bootloader will fail, not brick your device.
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that doesnt make sense to me
it fails to boot, you can flash a kernel on a locked bootloader, the signature verifacation i do belive just doesnt like non existant or custom signatures
the result is a soft bricked device, its why i said it will brick your device, i may not have specified weather it was a soft or a hardbrick because both can happen from flashing a Rom or a Kernel to a device which its not ment for
im having trouble understanding you here?
my point being that you cant flash a Z2 rom or kernel to a Z1 and you cant flash a Z1 rom to a Z, cross-flashing isnt somethig to ever do
Envious_Data said:
that doesnt make sense to me
it fails to boot, you can flash a kernel on a locked bootloader, the signature verifacation i do belive just doesnt like non existant or custom signatures
the result is a soft bricked device, its why i said it will brick your device, i may not have specified weather it was a soft or a hardbrick because both can happen from flashing a Rom or a Kernel to a device which its not ment for
im having trouble understanding you here?
my point being that you cant flash a Z2 rom or kernel to a Z1 and you cant flash a Z1 rom to a Z, cross-flashing isnt somethig to ever do
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Sorry it's me who's got it wrong, I assumed by brick you'd meant hard brick and I'd misunderstood the issue with flashing kernel on bootloader locked devices.
So let's agree, Don't try and flash kernels or custom roms with custom kernels on locked bootloader devices.
Hello,
[Okay i'm going to be quite honest, i might sound like an idiot on my post haha.] I just got my LG G3 and i've already root'd and got twrp and everything but i just saw a thread about bump and "Unlocking your LG G3" and having to do with Bump. I'm curious does that mean you can unlock your phones sim?? lol i might sound like an idiot or does it mean that we can now flash roms from lets say the GSM model of the G3 or roms from the Verizon model etc. This isn't a troll post i'm just that stupid lol. Anyways if someone can help me get a better understanding of this Bump software.
Does it mean unlocked bootloader? omg lol im an idiot..
Well as of right now there is no bootloader unlock. Bump is just a modified version of twrp for our device. The normal twrp from the twrp website works fine its mostly on prefrence. Before we had offical twrp we had to bump but now you can use either.
Sorry but can you explain what a bootloader is and why its important? Sorry for being stupid ?
No problem! (I have no problem with helping if you want you can PM me)
a bootloader is code that is executed before any Operating System starts to run. Boot loaders are basically packages that have instructions to boot the operating system kernel.
Bootloader are bad because it makes it much much much hard to run custom roms (custom os) and kernels. That is why we have bump it pretty much goes around the face that the bootloader is locked. If someone got ours unlocked then you can make roms a lot easier.
One a nexus for example once you unlock the bootloader you can install custom roms such as cm. Since ours is locked devs have to make the rom then they have to go and "bump" it that way the bootloader doesn't get flagged and brick itself.
Alrightthanks for clarifying that. I didnt know that the LG G3's bootloader was still locked, i guess thats why i see alot of rom threads being closed for the G3
Maybe if we (ls990 users) made a bounty someone may "find" a way to unlock our bootloader
1619415 said:
Maybe if we (ls990 users) made a bounty someone may "find" a way to unlock our bootloader
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Thanks again for the education!
moderator can close now
1619415 said:
Well as of right now there is no bootloader unlock. Bump is just a modified version of twrp for our device. The normal twrp from the twrp website works fine its mostly on prefrence. Before we had offical twrp we had to bump but now you can use either.
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To be clear, "normal" TWRP works fine because it has been "bumped." Without Bump there would be no way to load a non-stock recovery.
Bump, while not a true bootloader unlock , is a work-around that provides pretty much the same benefits. Without it, you would not be able to flash any custom recovery, and without a custom recovery you'd be unable to flash any custom ROMs.
Thank you for more clarification