So I bought this a while back with the intention of rooting it, but never got around to it. Now I just want to lock the bootloader, update the software and give it to my kid. Can I relock it? Will it be safe to update the software without fear of a soft brink (which is where my T500 currently is after trying to upload an updated ROM)?
Just perform in the reverse order? I searched but got too many "Unlock" results...
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Currently own an s5 and wondering how I can speed it up and debloat it. My storage says I only have 12 out of 16 gig left but I hardly have any apps installed. I checked to see what is taking all the space up and is saying other files....another issue I noticed ever since I uprated to lollipop was battery drains faster than usual. What is the best way to remedy these issues? Does the latest update fix any of this or do I need to bounce back to kit Kat or even do a custom rom? If anyone can help I would appreciate it I am on Verizon.
The 16GB is a lie, they use a lot of that 16GB for the OS itself, you get what's left
Factory reset after upgrading from KK to LP, that fixes the majority of problems upgrading causes
But if I factory reset will I be able to go back to kit Kat later if the issues are not resolved with lollipop? I heard somewhere once you reset you can't go back?
Factory resetting isn't what stops you rolling back, locked bootloaders are
And from what I know, Verizon lock theirs, I'm not 100% sure about the cans and can'ts regarding locked bootloaders and stock ROMs, some people say they can flash stock back and forth no problems, others need to take their phones to the store to get it flashed back to KK
Either way, factory resetting is a must after upgrading from KK to LP
So if I do reset it won't prevent me from ever being able to go to kit Kat again if the reset doesn't fix the issues? If I root and install a custom rom will it make the phone much faster/bettbetter?
No, factory resetting does not prevent anything, just make sure to disable reactivation lock first
Locked bootloaders, which you will likely already have, ar what prevent flashing ROMs and such
If you are already on LP, you might already not be able to downgrade, like I say I don't know enough about locked bootloader phones (Verizon etc) to know what you can and can't flash
Chances are, you're already stuck with LP unless you take it to a store
Resetting has nothing to do with downgrading back to KitKat. That was determined when you upgraded to Lollipop. if your bootloader is locked from the upgrade to LP, you won't be able to downgrade no matter what (at least until someone finds an exploit).
If your phone does not have a locked bootloader, you can still downgrade, even if you reset the phone.
mike-y said:
Resetting has nothing to do with downgrading back to KitKat. That was determined when you upgraded to Lollipop. if your bootloader is locked from the upgrade to LP, you won't be able to downgrade no matter what (at least until someone finds an exploit).
If your phone does not have a locked bootloader, you can still downgrade, even if you reset the phone.
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Cheers for explaining Mike
Thanks for the responses. How can I find out of I have a locked bootloader? And if I do is it still possible that verizon can downgrade back to kit Kat if I bring it in the store? And if all that fails is it possible to root the phone and put the best Rom possible on it ?
Pivo187 said:
Thanks for the responses. How can I find out of I have a locked bootloader? And if I do is it still possible that verizon can downgrade back to kit Kat if I bring it in the store? And if all that fails is it possible to root the phone and put the best Rom possible on it ?
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You do have a locked bootloader
Yea the store should be able to do it
Don't know if there are any methods for rooting / custom ROM locked bootloaders
Thanks for the reply detection. Does anyone else know if it's possible to root on Verizon with the s5? Or is it not worth it?
What is best to do to get my battery and the speed of the phone fastest? If I do downgrade to kit Kat is it possible to turn off updates somehow?
It appears once I unlocked my bootloader, even after locking it again, I am incapable of taking OTA updates, even after relocking the bootloader. Is there any way around this? If not, is there any place I can get the latest ROMs to flash?
Did you root? Then this is the cause for not being able to update. You can search the other threads to find the solution.
I have a ZF3 that I rooted /unlocked the boot loader long ago. Like, way back when you still got that "modified device" error. If I apply security updates, will it be ok?
Bump, no one has any input?
What do you mean when you say "will it be ok"?
You can install all the latest software updates even though your phone is rooted and has an unlocked bootloader. It will un-root your phone in the process though so be prepared to re-root.
Thanks for the reply. Essentially I was asking if there were any adverse effects, like the phone being bricked somehow. Re-rooting doesn't seem like too much of a pain. Thanks.
Does anyone know if it is possible to re-lock the bootloader on the Galaxy Tab A T510? If so, would I begin with flashing back to stock firmware then disabling OEM unlock in developer options or following different steps? I certainly want to avoid bricking the device. I've searched for a solution but can't seem to find anything. Thanks!
dlehmanusa said:
Does anyone know if it is possible to re-lock the bootloader on the Galaxy Tab A T510? If so, would I begin with flashing back to stock firmware then disabling OEM unlock in developer options or following different steps? I certainly want to avoid bricking the device. I've searched for a solution but can't seem to find anything. Thanks!
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You need to download the latest stock firmware either from Samsung or Sammobile and use Odin to flash it. DO NOT DISABLE OEM!!!! That has nothing to do with locking the bootloader. Flashing the stock ROM will do that. The OEM enable only disables the FRP lock which makes you login with the same google account used BEFORE a factory reset. If you are sure you know that account login and password, the FRP lock isn't a problem.
edit: The problem with the FRP lock is that people will often create a new google account login and password when first setting up their tablet. And because you only have to do that once, they tend to forget one or the other. Then, if they do a factory reset without the OEM enabled, they are locked out of the tablet.
Thanks for the detailed information and clarification. Your help is much appreciated!
The T510 doesn't have a locked bootloader.
ashyx said:
The T510 doesn't have a locked bootloader.
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No, but it does "lock" the tablet from getting OTA updates.
I have reflashed the stock firmware however I'm still receiving the following message during boot..."The bootloader is unlocked and the software on this device cannot be verified". Is there a way to remove this message? I am planning to return the device and I want to reset everything. Thanks!
Hello, I am trying to unbrand my LTE Tab A from Sprint SM-T517P by flashing another CSC, or flashing another PIT on a patched version of ODIN with no success.
Can anyone tell me how to do it properly? I have read about Chimera, and Samkey, but they are too expensive, and I worry about bricking my LTE tablet (do not want to root, and there is no root anyway).
Any help?
I made little progress. I think I got the latest correct firmware for it downloaded, but it didn't want to flash with a patched Odin, but it did flash successfully with a non patched version of Odin.
After that, I tried flashing a CSC from another firmware of an LTE that is unbranded (SM-T515), but I always get a SECURE CHECK FAIL PIT error.
Does that mean I need to unlock the bootloader? Is that even possible? I wonder how Chimera, or Samkey is able to change CSC thru just software, but they are too expensive for me
Any help?
I soft bricked the tablet by flashing the AP, CP, and CSC of the latest firmware of International unlocked model SM-T515... I was able to recover by flashing its latest firmware for SM-T517P.
I worry about hard bricking it, but after so many tries with different things, I feel so close
Flashing only the CSC of any other firmware hasn't worked so far, and flashing anything other than Android 10 Q doesn't work either, even after unlocking bootloader.
I have NOT flashed bootloader of another firmware yet, super worried I may hard brick it if I flash another BL even after unlocking its bootloader.
hmmm i dont think there are many modifying the sm-t517p. i also own one of those on t mobile . i wanted to add twrp and root ....i cant seem to find any version made for it...so onto the magisk played with thatfor a couple days and locked it up a few times ...i think for now ill be okay with no modding ..idk why im compelled to screw p a perfectly fine working tab-phone. i did however just see that kali linux can be run on it without messing the os up..maybe ill ry that next... why did you want to modify yours? so you could switch carriers im guessing? luckily for me t-mobile took over sprint........just curious
bootloader unlock...
Unlocking Bootloader​Unlocking the bootloader on modern Samsung devices have some caveats. The newly introduced VaultKeeper service will make the bootloader reject any unofficial partitions in some circumstances.
Allow bootloader unlocking in Developer options → OEM unlocking
Reboot to download mode: power off your device and press the download mode key combo for your device
Long press volume up to unlock the bootloader. This will wipe your data and automatically reboot.
Go through the initial setup. Skip through all the steps since data will be wiped again in later steps. Connect the device to Internet during the setup.
Enable developer options, and confirm that the OEM unlocking option exists and is grayed out. This means the VaultKeeper service has unleashed the bootloader.
Your bootloader now accepts unofficial images in download mode
Crystaltransistor said:
hmmm i dont think there are many modifying the sm-t517p. i also own one of those on t mobile . i wanted to add twrp and root ....i cant seem to find any version made for it...so onto the magisk played with thatfor a couple days and locked it up a few times ...i think for now ill be okay with no modding ..idk why im compelled to screw p a perfectly fine working tab-phone. i did however just see that kali linux can be run on it without messing the os up..maybe ill ry that next... why did you want to modify yours? so you could switch carriers im guessing? luckily for me t-mobile took over sprint........just curious
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Hi, I also have a sm-t517p and have searching to find twrp and root. So you had no luck at all? No root even with magisk?