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What are the advantages and disadvantages of unlocking the bootloader?
i'm a little bit confused about this..
i was a former samsung galaxy 5 user.. and i used to have cyanogenmod7.2 on it.. it was easy to flash on samsung phones.. and i knew the risks involved with it..
but can you tell me how different and how this would be a big help? thanks..
Having bootloader "unlocked" allows flashing/use of custom kernels. Custom kernel is needed for advanced firmwares, like cyanogenmod, so having locked bootloader, cm can't be installed.
Still changes in system partition are possible using an exploit to obtain root access to the phone, allowing reasonable system customization (like bloatware removal).
Two ways of bootloader unlock are available - the official one provided by SE web service, where you are forced to agree for voiding the warranty (providing your imei, so they know which phone is to be unlocked). This way access to DRM is lost forever.
And there is unofficial "unlock" way using testpoint shortcut to ground pin, which somehow bypasses signature checks in bootloader and allows kernel with not valid signatures to run (even though bootloader looks like still locked). This way DRM access is kept. It should also be possible to revert this type of unlock and return to stock fw. Unfortunately the testpoint is covered, so using it (even blindly with a needle) might be noticeable if the phone is examined.
now i know that samsung is easier than SE..
anyway, what exactly is DRM and what does it do in our phone? why is it essential? thanks for answering..
DRM (Digital Rights Management) is a "feature" to provide conditional access to media content. It is (was?) used in TrackID application.
Without DRM access (after official bl unlock), TrackID does not work.
It is rumoured that some newer version of trackid does not need drm to work.
In any case, there are alternatives for trackid not needing drm, so it's not really essential.
But losing it is irreversible so it's better to think twice if someone needs it or not or if just wants to keep the phone in "a bit more unaltered state".
so it's just for music? or media content means for all types of media? like images, videos and music?
what units does not lose the DRM? i just bought mine.. but i think it has a firmware build of A.0.42.. sony ericsson is really different on how samsung phones work.. oh my..
In general, DRM may be used to manage conditional access to nearly any content.
Currently I know only about trackid that needs it in xperia phones (never used it though and not sure about any other stock apps as I don't use most of them either, due to needed registration or possible spyware). Purpose of trackid is to record a sample of music around you in order to serve you details about the song played (using internet access).
But in general, it might happen, that in future stock fw update, there might be another new app, that could use DRM originally available, so you could buy music/video whatever... If it's not there already...
Simply it's kind of copy protection.
Without it, you cannot buy/access the protected content.
It's better to avoid using it in my opinion...
so this means it's much safer to have an unlocked bootloader? because DRM does not have any major use anyway?
and how about official firmware releases? will it affect how we update our phones?
komiks0916 said:
so this means it's much safer to have an unlocked bootloader?
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safer? what do you mean?
It's about preference. I don't like DRM so wouldn't mind not having it.
On the other hand, there is a way to "unlock" and still keep it (with possibly better chance to keep the warranty as well). But could be more difficult for not experienced person to do it.
If you do not need special kernels, BL unlock is not needed at all.
komiks0916 said:
and how about official firmware releases? will it affect how we update our phones?
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Click to collapse
you will not able to update your phone after bootloader unlocking, though i read on arc section that there is a way, but if I was in your place, I wont take risk if I want to try SE ICS
right, with unlocked bootloader (at least the testpoint way, which I have my own experience with) the update (over the air) bricked it quite badly... I had to re-lock and then it worked again...
Not sure how it is with the official SE unlock way.
But it's possible to update with flashtool after ftf image appears (when someone converts it from official SE update).
j4nn said:
right, with unlocked bootloader (at least the testpoint way, which I have my own experience with) the update (over the air) bricked it quite badly... I had to re-lock and then it worked again...
Not sure how it is with the official SE unlock way.
But it's possible to update with flashtool after ftf image appears (when someone converts it from official SE update).
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Click to collapse
how did you re-lock it?
ajzak said:
how did you re-lock it?
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Click to collapse
http://forum.xda-developers.com/showpost.php?p=18446125&postcount=64
j4nn said:
right, with unlocked bootloader (at least the testpoint way, which I have my own experience with) the update (over the air) bricked it quite badly...
Click to expand...
Click to collapse
It was fixed in latest version of setool (not free s1tool).
now i'm confused.. so getting bootloader unlocked via SE's official way has no way to re-lock it? and i wont get official update?
and what is setool? sorry.. i'm new to SE.. thanks for answering the questions guys.. i'm really learning now..
komiks0916 said:
what is setool?
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Click to collapse
setool....
radmir said:
setool....
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Click to collapse
it's not free? right? i see..
uhm can i ask wha is the best type of partition for SE? FAT/ext2/ext3/ext4?
important and needs urgent answer!!!
only the phones firmware or ROM is affected by the update failure right???
or does it apply to the apps present in the phone as well???
please clear....
pavanakasingam said:
only the phones firmware or ROM is affected by the update failure right???
or does it apply to the apps present in the phone as well???
please clear....
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Click to collapse
No, you should just never ever upgrade over the air (via wlan, ota update) and PC Companion/Sony Update Service on your computer won't work anymore. But you are still able to update your apps in the playstore
No unlock bootloader = no custom kernel :highfive:
i have sony xperia s , unlocked boot loader , rooted , cm9
iam willing to relock my bootloader when a stock JB rom is avialable from sony so when i was backing up some apps on titanium backup i saw an option to back up some thing with a long name that contains DRM Codes is this helpful , so relock boot loader , root and then restore them through titanium back up , does it work ?
elias234 said:
i have sony xperia s , unlocked boot loader , rooted , cm9
iam willing to relock my bootloader when a stock JB rom is avialable from sony so when i was backing up some apps on titanium backup i saw an option to back up some thing with a long name that contains DRM Codes is this helpful , so relock boot loader , root and then restore them through titanium back up , does it work ?
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Click to collapse
nopes, DRM is on the kernel, when you unlock your bootloaded DRM keys will be erase. You can't never ever get it back !! :cyclops:, but DRM keys are not necessary for me actually
Mr.Krypton said:
nopes, DRM is on the kernel, when you unlock your bootloaded DRM keys will be erase. You can't never ever get it back !! :cyclops:, but DRM keys are not necessary for me actually
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can you tell me exactly what DRM codes are for ?
I now that they stop the functioning of some apps , can you tell me the names of some apps,
elias234 said:
can you tell me exactly what DRM codes are for ?
I now that they stop the functioning of some apps , can you tell me the names of some apps,
Click to expand...
Click to collapse
I think album art downloading in Walkman is the only thing that breaks.
Seems that the location button on the messaging menu also doesn't work.
"I got my values. So you can keep yours, OK?"
But what if we knew where they were, so somebody can extract those before unlocking the BL...? And then we can restore them?
If they're on the kernel, is there no way to remake the stock kernel with DRM keys??
Track id also does not work
Who bothers we can download it from Google play again
If drm keys are on kernel.. Can a copy of stock kernel be made to preserve those drm keys?
Sent from my ST25i using Tapatalk 2
Not on kernel I think...
Because update also contains a new kernel...
One more thing, Search option in geotag of album app is also not working...
Join us here with your Xperia P
http://www.facebook.com/groups/SonyXP/
But an official Sony update wouldn't delete official Sony data! So what if DRM keys are in BOTH kernels?
Also, how can we make a copy of the kernel? I'd do it, if I only knew how...
drsanket_xperia_u said:
Track id also does not work
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Click to collapse
It's working for me normally like with locked bootloader...
someone755 said:
But an official Sony update wouldn't delete official Sony data! So what if DRM keys are in BOTH kernels?
Also, how can we make a copy of the kernel? I'd do it, if I only knew how...
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Click to collapse
It isn't on the kernel. It is somewhere else.
Rodger_Rulez said:
It's working for me normally like with locked bootloader...
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He meant with unlocked bootloader. Still, strange, works for me even unlocked.
"What really matters in this world, anyway?"
TrackID works even with unlocked BL, what is not working since drm keys are gone it's the "download music info" that is another thing!
Its already gone so no use!
Sent from my Xperia Sola using xda app-developers app
TrackID works fine. but the problem is the Download music info, does any one know how to fix this?
Odp: [Q] relocking sony xperia s without loosing DRM codes
raizuko said:
TrackID works fine. but the problem is the Download music info, does any one know how to fix this?
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Look on date of last post and think... Go to S section and ask there.
Sent from my LT22i using xda-developers app
Hi guys, yesterday I just installed on my xperia z2 .726 LP stock, prerooted and with recovery. And I don't know if its good for me or no. And as the lollipop is getting updated, im thinking maybe i should go to 5.1?
The question is: Is it really worth unlocking my bootloader and going for 5.1 or I should stick with stock and with locked bootloader?
What I lose if i unlock my bootloader?
And if its worth it, can you give me the links to do it the safest way, without losing some things
Unlocking your bootloader is safe as long as your not stupid about it
You will lose your warrenty, and some xperia features spesific for the stock rom ( these are permanent because unlocking your bootloader wipes your TA partition where unique information is kept)
You can backup your TA if your device is rooted
(google will help here)
So Is it really worth unlocking my bootloader and going for 5.1 or I should stick with stock and with locked bootloader?
And maybe, if u kind, can you tell me, what rom, kernel, what do you use?
Dendis said:
So Is it really worth unlocking my bootloader and going for 5.1 or I should stick with stock and with locked bootloader?
And maybe, if u kind, can you tell me, what rom, kernel, what do you use?
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Click to collapse
Id rather stay with stock but androPlus kernel
Stock has all the features and the look i need above any commom custom rom
And the custom kernel alows for some aditional customization as well as some patches that alow even more e.g. xposed
(easier to root, recovery is more static you could say)
If you realy dont care about X-Reality, your warrenty and a couple of xperia apps then an unlocked bootloader is for you.
Envious_Data said:
Id rather stay with stock but androPlus kernel
Stock has all the features and the look i need above any commom custom rom
And the custom kernel alows for some aditional customization as well as some patches that alow even more e.g. xposed
(easier to root, recovery is more static you could say)
If you realy dont care about X-Reality, your warrenty and a couple of xperia apps then an unlocked bootloader is for you.
Click to expand...
Click to collapse
Okay, if I do unlock my bootloader, i lose my warranty, xperia apps, x reality, but doesn`t restoring TA keys, gives me back all of it?
Oh and what about camera?
Dendis said:
Okay, if I do unlock my bootloader, i lose my warranty, xperia apps, x reality, but doesn`t restoring TA keys, gives me back all of it?
Oh and what about camera?
Click to expand...
Click to collapse
You lose all that but sony cant tell if you restored your TA or not when you did so yes
Camera quality on stock rom is good but on Ub its somewhat lost however the results are more honnest so to someone who is into photography UB is better
On custom roms its about that of stock, CM based usualy varies depending on the scene.
Envious_Data said:
You lose all that but sony cant tell if you restored your TA or not when you did so yes
Click to expand...
Click to collapse
So I can unlock any time I want and I can relock any time I want. And all functions will be lost/restored if bootloader unlocked/relocked ?
Envious_Data said:
Camera quality on stock rom is good but on Ub its somewhat lost however the results are more honnest so to someone who is into photography UB is better
Click to expand...
Click to collapse
So, if I unlock, does my camera becomes a lot worse? And if I relock, does my camera go back to normal?
Envious_Data said:
On custom roms its about that of stock, CM based usualy varies depending on the scene.
Click to expand...
Click to collapse
So if I unlock, install androplus and existenz 2.0 Y , will I get much worse camera quality?
Dendis said:
So I can unlock any time I want and I can relock any time I want. And all functions will be lost/restored if bootloader unlocked/relocked ?
So, if I unlock, does my camera becomes a lot worse? And if I relock, does my camera go back to normal?
So if I unlock, install androplus and existenz 2.0 Y , will I get much worse camera quality?
Click to expand...
Click to collapse
1. This only applies if you restore your TA if backed up before unlockimg
2. The camera quality doesnt even drop all too much.
Envious_Data said:
1. This only applies if you restore your TA if backed up before unlockimg
2. The camera quality doesnt even drop all too much.
Click to expand...
Click to collapse
So, camera goes a lot worse in CM roms?
So, I can easily go for TA backup, unlocking and installing existenz with androplus kernel, or even your kernel, if you release it ? ) (camera is important for me) (I want bigger battery life, now its 2days, with 5hrs of sot)
Dendis said:
So, camera goes a lot worse in CM roms?
So, I can easily go for TA backup, unlocking and installing existenz with androplus kernel, or even your kernel, if you release it ? ) (camera is important for me) (I want bigger battery life, now its 2days, with 5hrs of sot)
Click to expand...
Click to collapse
Camera quality isnt lost much on any rom
Atleast from the way i use my camera.
Hello XDA community,
I have a Xperia Z2, and i unlocked bootloader WITHOUT saving my DRM Keys, (i know shame on me :crying, now i know I did something stupid, nothing to do about it, but since i unlocked, i have had several problems: inestability, it means i am using an app and it restarts, or just closes, or even my phone restarts, if I go to contacts i dont have facebook contacts, the option just dissapeard, it means birthdays dont show in calendar, average camera photos just too noisy or awful photos, xreality not working properly, i know some issues are known but i havent heard about facebook contacts, to be honest i feel really bad with phone like it. So my questions are these, and thank u, thank u who could answer me, just work with me I know a little of these world, so if u could be a little specific about instructions or solutions i would really appreciate it:
1) Having an unlocked bootloader phone, in terms of security, is it easier to hackers to mess up my phone?
2) Is it better to lock my bootloader, if so, how can i do it, resolving my issues and not losing features?
3) If unlocked bootloader is an option, how can i have my phone back, i mean without issues? ( I read a thread about this point, but i confuse a little, because i dont have recovery or rooted)
I tried installing an ftf from flashtool, issues still there =(
Thank your for ur patience.
God bless u.
EDG5U5 said:
1) Having an unlocked bootloader phone, in terms of security, is it easier to hackers to mess up my phone?
Click to expand...
Click to collapse
Hmm technically yes. I guess it would be detrimental if someone grabs your phone and flash's a hacked boot.img. Root on your phone is more of a risk with an internet based attack or corrupt apk.
EDG5U5 said:
2) Is it better to lock my bootloader, if so, how can i do it, resolving my issues and not losing features?
God bless u.
Click to expand...
Click to collapse
You can lock your bootloader but it won't fix your issues as you've lost your drm keys. There is a drm fix in the cross development section I think. Google "Xperia drm fix xda". Not sure if this will fix your Facebook issue though, I've never heard of that one. To relock your bootloader google "Xperia relock bootloader xda"
EDG5U5 said:
3) If unlocked bootloader is an option, how can i have my phone back, i mean without issues? ( I read a thread about this point, but i confuse a little, because i dont have recovery or rooted)
God bless u.
Click to expand...
Click to collapse
Firstly, if you don't have recovery or root, why unlock your bootloader? Thats sort of the point.
Since you lost your drm keys, the best thing you can do is flash a stock ftf file, apply the drm fix and relock your bootloader. It will never be 100 percent the way it was as you can't reapply your drm keys.
EDG5U5 said:
God bless u.
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Isn't that the source of most of the worlds issues at the moment?
Sent from my D6503 using Tapatalk
o0 Matt 0o said:
Hmm technically yes. I guess it would be detrimental if someone grabs your phone and flash's a hacked boot.img. Root on your phone is more of a risk with an internet based attack or corrupt apk.
You can lock your bootloader but it won't fix your issues as you've lost your drm keys. There is a drm fix in the cross development section I think. Google "Xperia drm fix xda". Not sure if this will fix your Facebook issue though, I've never heard of that one. To relock your bootloader google "Xperia relock bootloader xda"
Firstly, if you don't have recovery or root, why unlock your bootloader? Thats sort of the point.
Since you lost your drm keys, the best thing you can do is flash a stock ftf file, apply the drm fix and relock your bootloader. It will never be 100 percent the way it was as you can't reapply your drm keys.
Isn't that the source of most of the worlds issues at the moment?
Sent from my D6503 using Tapatalk
Click to expand...
Click to collapse
Thank you for your answer I ll try to fix it and then relock bootloader, I ll tell you all how it goes...
About God being the source of most of the world issues, I really think he is the answer, the problem to me, is the heart of men, not loving each other... I really mean it if I say to you GOD BLESS YOU, and thank you for your help. ?
EDG5U5 said:
Thank you for your answer I ll try to fix it and then relock bootloader, I ll tell you all how it goes...
About God being the source of most of the world issues, I really think he is the answer, the problem to me, is the heart of men, not loving each other... I really mean it if I say to you GOD BLESS YOU, and thank you for your help. ?
Click to expand...
Click to collapse
Please report after doing that !
I'm also tired of this specially camera quality!
For both of you,about camera quality with unlocked bootloaders:Just flash from recovery Drm Restoration file from thread Xperia Z drm keys restoration amd you would have same pictures qhality like before:crisp images,with accurate colors and etc.
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What will I loose if I unlocked my bootloader? Is there way to root without unlocking it? Or its still not possible? Any alternatives so that I will not loose any important features in my Xperia z5c? I'd like to use my Xperia z5c in full customization. Thank you in advance for answering.
Almost nothing, practically all custom kernels come with a DRM fix. (Normally you would lose some extra Sony features in sound, camera)
The only thing is, you won't be able to restore it. There is no way of rooting without unlocking your bootloader.
harry_turtle said:
Almost nothing, practically all custom kernels come with a DRM fix. (Normally you would lose some extra Sony features in sound, camera)
The only thing is, you won't be able to restore it. There is no way of rooting without unlocking your bootloader.
Click to expand...
Click to collapse
Thanks for answering so its better to unlock bootloader?
shadow_chaser said:
Thanks for answering so its better to unlock bootloader?
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Click to collapse
Sony warns you that unlocking BL voids your warranty.
But I've send in my phone after unlock BL and got a new one without any issues.
I would recommend to flash stock rom before you send it in for warranty.
Better is hard to say, it depends on what you want to do. If you want root access you'll have no other choice.
harry_turtle said:
Sony warns you that unlocking BL voids your warranty.
But I've send in my phone after unlock BL and got a new one without any issues.
I would recommend to flash stock rom before you send it in for warranty.
Better is hard to say, it depends on what you want to do. If you want root access you'll have no other choice.
Click to expand...
Click to collapse
Thank you for answering.