[Q] OEM unlock on Note 4? - Galaxy Note 4 Q&A, Help & Troubleshooting

(my browser spazzed and I lost my last post if it shows up as a double ignore the other one!)
I'm new to Android and finding it confusing so thanks for the help so far!
I have a 910F Note 4 on Lollipop and want to root it to get rid of bloatware and possibly stop ads (if I can convince myself it's ethical) btu I *may* want to custom ROM it later.
So far your help and my reading have taught me this:
-- I can root using chainfire in order to get rid of bloat and block ads
-- If after rooting I later want a custom ROM or Xposed I'll need to get custom recovery in which case I'll be able to add CWM or TWRP later to my rooted phone
Assuming the above are true (if not please tell me!!) my question is this:
What on earth is oem unlock/bootloader unlock? In my reading I've come across people talking about this and it wiping the phone. I can't find an easy answer online. If I root +/- do CWM/TWRP will that automatically do OEM unlock or are they different things? Is bootloader unlock a different thing too? I'm confused! Will I need to root AND custom recovery AND oem unlock AND unlock bootloader?
Thanks in advance!!!

Some devices come with a locked bootloader, where you may be able to root the device via an exploit, but you can't change lower level software (ie kernel and/or recovery)... unless there is an unlock method for the bootloader.
The devices that do have a locked bootloader can be locked by the manufacturer, or by the carrier. That's the difference between the two. Either way the bootloader is still locked, only difference is who called for the locking.
For example, note 4 on tmobile does not have a locked bootloader, however, note 4 on at&t does. That decision was made by at&t, not Samsung. As far as I know, the at&t variant does not have a method for unlocking the bootloader yet so there's not much development for the device.
Compare to nexus devices, where Google automatically has the manufacturer lock the bootloader, but it being a development device, it's the easiest bootloader to unlock. It's literally a one line command in adb. HTC devices are locked but you can get an HTC dev code to unlock it from HTC.
I hope that makes sense. The best way to determine if your device has a locked bootloader is to visit the development forum or the general/Q&A forums for your device. If you have a locked bootloader and there is an unlock method, you only have to do it once (until you update or relock your bootloader). Some locked devices never get an unlock method. It designed to maintain the security and integrity of the device, but it also prevents user tampering.

Thank you for your thorough reply absinthesummer, very helpful.
However I'm still a little confused. My reading suggests to me that T-Mobile (910T) is *rootable* and the AT&T version (910S?) is not *rootable* but I'm in the UK and don't use these providers I use EE. And so I have the international variant of the Note 4 which is the 910F. I don't see a subforum or help for the UK EE version of the note 4 but as it's the 910F I assume that's the one I need to search for and not worry that EE will have put their own lock onto the 910F??
Now, because this happens to coincide with what you are saying has a locked bootloader or not, am I to assume that whether or not something is rootable is the same as whether or not it has an unlockable bootloader? i.e. is something only rootable or not because its bootloader is unlockable or not? If so therefore am I correct to assume that as the 910F which I have is rootable that it is also bootloadunlockable? And furthermore am I correct to assume that the very process of rooting itself unlocks the bootloader? Or perhaps in the case of the 910F it doesn't need to be so is even easier than Nexus devices? i.e. I just simply root and that in itself mean bootloader is already unlocked (and I am assuming that oem unlock is the same thing?)
I'm getting myself in a muddle I think!

Hehe it's totally cool, and yes your carrier could put a lock on it but that's incredibly rare in Europe due to frequent traveling between countries and the need to change Sims and carriers often... or at least that's what I've been told. The US carriers who lock their bootloaders are typically GSM carriers who do not expect you to need to root/carrier unlock/whatever. It's a control thing imo.
Anyway, your note 4 does not have a locked bootloader. If you check the development forum for your device you will see plenty of roms and guides and directions for rooting. That's usually a good indication that a device is unlocked (and those anticipating the release of new devices tend to get lock information prior to release, so they know which device they intend to buy).
Anyway, since you don't have a locked bootloader I wouldn't worry about it... that reminds me of a device I had for about a week, the LG L9. It had an oem bootloader lock but the international variant did not. We could root it & use a specially designed recovery with the bootloader locked but we couldn't flash a custom kernel (with a custom rom). They figured out that we could flash the international firmware and unlock that way, but it would make our display backwards (mirrored) and while that could be fixed, we would never be able to revert the boot screen. Now that's way too much trouble to go through just to unlock a bootloader and I did end up returning it and getting an s3 instead.
Bootloader locks are no fun, but they are not often placed on international devices for various reasons, so really I wouldn't worry about it too much.
If you get a device like a Google nexus, or an HTC that has a known locked bootloader, the bootloader and unlock method will be specifically mentioned in the routing guide. I hope that helps.
One more thing: rootability and locked bootloaders are not mutually exclusive, sometimes you can root devices with locked bootloaders and sometimes people will come up with ways around them (ie note 3 has safe strap recovery that runs parallel to stock recovery) to be able to use custom roms. However, if no exploit is found and there is no workaround, development will stall until one or both of those things is found. You may be able to root a device with a locked BL, but you may not be able to flash custom roms/kernels without a workaround. What I meant though is if you see a popular device with very little development, that's probably due to a locked bootloader and not having found a way around it yet. Most guides will explicitly mention the BL though if it's something you need to do

Yet another thoroughly helpful and detailed reply. Thank you very much indeed. You're a star!

Related

Motorola & Locked Bootloaders - Is it an issue?

I currently use a Samsung phone that does not have a locked bootloader. I've read that Motorola is one of the manufacturers that likes to ship their phones with a lock bootloader, and this prevents people from flashing/hacking/rooting their phone.
How big of an issue is this? Are there reliable and straightforward way to bypass a locked bootloader? If I were to get a Droid 4 next year which comes with a locked bootloader, will I still be able to flash it with custom ROM and root it?
Hi,
There are way too many threads discussing this, both in the general section and individual motorola threads.
Please search

Motorola Unlock BootLoader

Is it possible to unlock flipout from this website ? https://motorola-global-portal.custhelp.com/app/standalone/bootloader/unlock-your-device-b
Also is there any custom rom for it ?
No, the Unlock My Device program at the moment supports only one new device, the Photon Q 4G LTE.
I really hope that the masterminds at Motorola will soon add many more devices, especially older ones like the Flipout. Many of these devices are out of warranty by now anyway.
As for custom ROMs, there are none. Unfortunately the Flipout was not very popular with the modders. However, with an unlocked bootloader this could change.
So... how does one 'SIM unlock' this phone?
Do I understand right, that it needs to be rooted first?
Do I need to also CID unlock it, or is that only needed for flashing a custom ROM?
DylanKeyne said:
So... how does one 'SIM unlock' this phone?
Do I understand right, that it needs to be rooted first?
Do I need to also CID unlock it, or is that only needed for flashing a custom ROM?
Click to expand...
Click to collapse
Only way for BF/Charm is by code, does not require root. Check ebay: search for "unlock mb511" or "unlock mb502" - fairly cheap these days,
Actually, bootloader unlock and carrier/sim unlock are two different things, so we're rather off-topic here.
I'm sure Moto has no interest in unlocking bootloaders of phones they've already sold, so in response to the OP I should say, "No; absolutely not; not ever."

Looking to buy Moto X, need some clarifications.

[Tried posting this in Q&A forum but received no answers]
I am coming from Droid Incredible running CM 7.1 on PagePlus for 3 years (Verizon MVNO for those who don't know). So I am familiar with Android ecosystem and rooting.
I am looking to buy Moto X to be used in USA on H2O (AT&T MVNO) because on Pageplus the speed are limited to 3G and most new phones cannot be activated without flashing which I don't want to do.
1) Is there any reason NOT to buy Developer Edition (GSM Networks)? Current price is now the same as AT&T branded version and I am OK with just one color being available.
2) Am I correct in understanding that this version of the phone supports all LTE and HSPA frequencies both for AT&T and TMobile? Quote from the spec:
Networks
GSM/GPRS/EDGE - UMTS/HSPA + up to 42 Mbps - 4G LTE
2G/2.5G GSM/GPRS/EDGE bands
850/900/1800/1900 MHz
3G UMTS bands
850/900/ AWS/1900/2100 MHz with HSPA+ up to 42 Mbps (B5/B8/B4/B2/B1)
4G LTE bands
700/AWS/1900MHz (B17/B4/B2)
3) Are there any known issues with Moto X that has not been fixed with software updates yet? I am also considering Moto G which would be good enough for me but it has battery issues ("instant" drops from full charge to 1%) that are now investigated by Motorola but no solution yet. For Moto X so far I only found that some people have small cracks on their cases that are fixed by mailing it for warranty work.
1) I too considered the GSM Dev Edition of the Moto X but decided not to get it based on looks. I don't like white phones. The Dev Moto X has a woven white back and I didn't like that. I also have not use for 32GB of internal storage. I didn't even fill the 8GB that was on my RAZR M (previous phone). This was my reasoning, so I went with the MotoMaker GSM unlocked retail Moto X (also referred to as the T-Mobile version).
2)I don't know about the Dev version but if I had to guess I'd say it's like my phone, so yes. I have an AT&T SIM in my Moto X and I get 4G LTE when I'm in town.
3)The only issues I know of are the cracks as you mentioned and the some of the wood backs having a poor finish applied. There may be another that I've yet to read here but I've not had any problem with the phone.
Hikikomori-Otaku said:
1) I too considered the GSM Dev Edition of the Moto X but decided not to get it based on looks. I don't like white phones. The Dev Moto X has a woven white back and I didn't like that. I also have not use for 32GB of internal storage. I didn't even fill the 8GB that was on my RAZR M (previous phone). This was my reasoning, so I went with the MotoMaker GSM unlocked retail Moto X (also referred to as the T-Mobile version).
2)I don't know about the Dev version but if I had to guess I'd say it's like my phone, so yes. I have an AT&T SIM in my Moto X and I get 4G LTE when I'm in town.
3)The only issues I know of are the cracks as you mentioned and the some of the wood backs having a poor finish applied. There may be another that I've yet to read here but I've not had any problem with the phone.
Click to expand...
Click to collapse
I don't like white phones either but I want to be able to root. Is what you went with (MotoMaker GSM unlocked retail Moto X) essentially the same as Dev Edition other than color? Or is it only carrier unlocked but not bootloader unlocked?
JoeSchmoe007 said:
I don't like white phones either but I want to be able to root. Is what you went with (MotoMaker GSM unlocked retail Moto X) essentially the same as Dev Edition other than color? Or is it only carrier unlocked but not bootloader unlocked?
Click to expand...
Click to collapse
The main differences between the two would be the retail version can be customs made in MotoMaker and when the bootloader is unlocked you loose your warranty. The Dev version only comes in one style but your warranty will still be intact after unlocking the bootloader.
Hikikomori-Otaku said:
The main differences between the two would be the retail version can be customs made in MotoMaker and when the bootloader is unlocked you loose your warranty. The Dev version only comes in one style but your warranty will still be intact after unlocking the bootloader.
Click to expand...
Click to collapse
Thank you for responding. So the warranty will be void completely, even for the hardware issues completely unrelated to unlocking bootloader?
Can bootloader on retail version be re-locked to send it in for warranty?
I think I read that each time OS updates are released for Moto X new exploit may need to be found to root/unlock bootloader. Did I get it right or am I confusing something?
Can root be achieved without unlocking bootloader? If I understand correctly unlocking bootloader is really only needed if one wants to try different ROM-s and root can sometimes be achieved without unlocking bootloader. But Moto X is almost stock Android, so I see no point in trying other ROM-s but I do want to have root.
JoeSchmoe007 said:
Thank you for responding. So the warranty will be void completely, even for the hardware issues completely unrelated to unlocking bootloader?
Can bootloader on retail version be re-locked to send it in for warranty?
I think I read that each time OS updates are released for Moto X new exploit may need to be found to root/unlock bootloader. Did I get it right or am I confusing something?
Can root be achieved without unlocking bootloader? If I understand correctly unlocking bootloader is really only needed if one wants to try different ROM-s and root can sometimes be achieved without unlocking bootloader. But Moto X is almost stock Android, so I see no point in trying other ROM-s but I do want to have root.
Click to expand...
Click to collapse
Yes, your warranty will be completly void if you unlock the bootloader on any Moto X except the Dev version.
You can relock (and reunlock) the bootloader but because you have to get the unlock key from Motorola, they will know even if you relock it. I believe there is also a line in fastboot that will will indicate if the warrently is void (as a result of the first unlock).
This is true. With any update there is the potential for an exploit being 'removed'. The same is true for most bootloaders but not necessarily for this phone. Even if the bootloader is updated, the unlock code for your phone will still work.
Yes, root can be achieved without unlocking the bootloader but it's a complex method for this phone. It's much easier to unlock the bootloader, flash a custom recovery, and flash the SU binary. This is also the preferred method if it's avalible for your Moto X.
Unlocking your bootloader let's you do a few things. The most common it to flash another recovery image and thus a new ROM. You can also flash kernals, binaries, apps, and a few other things with the bootloader unlocked.
Hikikomori-Otaku said:
....
This is true. With any update there is the potential for an exploit being 'removed'. The same is true for most bootloaders but not necessarily for this phone. Even if the bootloader is updated, the unlock code for your phone will still work.
Yes, root can be achieved without unlocking the bootloader but it's a complex method for this phone. It's much easier to unlock the bootloader, flash a custom recovery, and flash the SU binary. This is also the preferred method if it's avalible for your Moto X.
Unlocking your bootloader let's you do a few things. The most common it to flash another recovery image and thus a new ROM. You can also flash kernals, binaries, apps, and a few other things with the bootloader unlocked.
Click to expand...
Click to collapse
So what specific exploit can be removed? For rooting? Or for unlocking bootloader? The way I understand one can always unlock bootloader using code from Motorola no matter if your phone is retail or Dev. Edition, however then root may or may not work? But this contradicts with what you said about if bootloader is unlocked then you can flash custom recovery and SU, so you can still always achieve root. Is there an FAQ or thread on this forum where this is described in details?
JoeSchmoe007 said:
So what specific exploit can be removed? For rooting? Or for unlocking bootloader? The way I understand one can always unlock bootloader using code from Motorola no matter if your phone is retail or Dev. Edition, however then root may or may not work? But this contradicts with what you said about if bootloader is unlocked then you can flash custom recovery and SU, so you can still always achieve root. Is there an FAQ or thread on this forum where this is described in details?
Click to expand...
Click to collapse
Any exploit can be removed, so long as they're found and will not inhibit the use of the device. I guess I should clarify a bit. Your bootloader and root access have different ways to get them. The bootloader basically protects the partitions of the phone. The only way to unlock the bootloader of the Moto X is to go to Motorola and get the unique unlock code for your Moto X. The Verizon retail and AT&T retail versions are the only two models of my knowledge that can't be unlocked by Motorola and no exploit has been found for them. How root is achieved by having an unlocked bootloader is as followed; The bootloader is unlocked giving the user access to the partitions of the phone > a custom recovery is flashed > using the new recovery SU binary is added (flashed) to the dormant Android OS. Without an unlocked bootloader, this method is impossible as you can't complete the first step. This is when an exploit in the Android OS is needed. The current SlapMyMoto exploit takes advantage that Motorola lets Moto X users downgrade. Once on a lower version of Android, we can root that and basically 'tunnel' up a path to give ourselves root in they newer version of Android. The unlocked bootloader method is preferred because it's easier and will almost always work (unless Android is given a huge remake). While in recovery, the Android OS is not loaded and thus can't protect itself. This makes adding stuff to it much simpler. When the Android OS is booted though, there are security measures in place that we unrooted can't get past without an exploit.
http://forum.xda-developers.com/showthread.php?t=2603358
This thread has a lot of good info from rooting on both locked and unlocked bootloaders, downgrading, and much more.
Honestly I think you answered your own question. If rooting is your number one priority and you don't mind the white back (which I like actually), then I think the Developer Edition is a no brainer for you.
If you want a custom phone and rooting isn't that important, or you don't care about the warranty, then I'd say get the MotoMaker version.
As far as bugs, the only bug I know of is an exchange bug (which I don't use exchange so I don't even know what the bug is/was), but it was fixed in 4.4.2.
You can root the carrier version ie motomaker. That's all you really need is root along with greenify, xposed, gravity box, and viper4android.
MOTO X Slapped
[email protected] said:
You can root the carrier version ie motomaker. That's all you really need is root along with greenify, xposed, gravity box, and viper4android.
MOTO X Slapped
Click to expand...
Click to collapse
Currently there is NO root method for 4.4.2 without unlocking the bootloader.

Don't need ROM, but want Root-> What's reqd?

I have recently been told that unlocked bootloader is not required for ROOT.
If I get N4, I'll want to root, but don't care about ROMS. So, I had been thinking I would likely need to got with TMO phone on AT&T, rather than AT&T, due to unlocked boot loader (although I planned to wait to be sure it is unlocked).
But, given that unlocked bootloader is not required for ROOT, I'm wondering if I still need to look at TMO. I suspect should just wait and see what shakes out.
Interested in hearing anyone's thoughts on Rooting possibility for the N4,

Us t-mobile giveway to developer

I am giving away a new S7edge to a developer of my choice to work on and create root/unlock for the snapdragon version.
If you feel you are competent enough to provide root for this device then send me a PM.
If you feel you know a dev that can do it if they had the device in hand then post their name here in this thread or send me a PM. In the end I choose who gets it based on their background. I will pay for shipping, etc for the developer of choice. All I ask is for you to work diligently on this device.
This device is the future of locked, unrootable devices. The sooner we get through this barrier the better for the sake of all future devices. This isn't the end, only the beginning.
There will be no developer bashing in this thread and will have this thread closed immediately if it happens.
Good offer! This giveaway plus the bounty would hopefully entice someone. It's a good chunk of $$$!! I really hope someone with enough time and smarts would find root. I can live with TW as long as it is rooted (I'm a rooted 930F user). See T-Mobile Galaxy S7 Edge and AT&T forums for the bounty threads. I think there is another thread on the Sprint S7 forum as well.
OP's giveaway is for an SM-G935T, Qualcomm SnapDragon SD 820 Galaxy S7 Edge. All US variants are the same (SM-G935T/A/P/V) . A root for SM-G935T should work on the regular US S7 as well (SM-G930T/A/P/V). It is bootloader-locked and it will remain so unless Samsung releases an unlock, but due to the way the BL was locked, it would be near impossible anyway. So, no custom ROM.
It may be rootable if a stable exploit can be found. Folks have been comparing the US SnapDragon to Chinese SnapDragon S7, but it is not comparable. Here is a good summary regarding the bootloader situation:
mathieulh said:
The CROM lock does not exist on non-Chinese bootloaders
Samsung's Chinese handsets bootloaders have in 3 types of bootloader locks, the carrier lock, the CROM lock (which is enabled if the Chinese bootloader does not find the "KIWIBIRD" string written in the STEADY partition), and the reactivation lock, they are not carrier locked.
U.S. variants only have the Carrier and reactivation locks, there is no CROM lock to unlock on these devices (or any international variants either), U.S. variants are however carrier locked, the lock is hardcoded in the bootloader code (there is just no execution path to load an unsigned kernel on the consumer carrier locked variant bootloaders, there is no "lock" Qfuse anymore, the bootloader itself just has no carrier unlocking/locking support, it is always locked by design) and the bootloader is tied to the device ID, for example SM-G935F (which is One Time Programmable) and will refuse to run on anything but the device id that is hardcoded within it, obviously the bootloader is signed so you can't modify it, there is also a revocation mechanism involving Qfuses to make sure you can't downgrade to a vulnerable version (should one exist).
There are presumably Engineering versions of the bootloader that allow running unsigned kernels but those have not been leaked and they probably won't run on devices for which the production mode Qfuse has been blown (the device is in Engineering mode when that Qfuse is not set).
Click to expand...
Click to collapse
Thread closed
There is already a thread on it here
http://forum.xda-developers.com/tmobile-s7-edge/how-to/t-mobile-s7edge-to-developer-t3383568

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