Develop Bugs

[Q] Back to stock

I unlocked, root, flashed rom FXP cm9 on my xperia s. When my phone is damaged and i want to sent it over for repair how i go back to stock?
What are the steps?
I'v been reading and is step 1 relock bootloader with relock ftf (http://forum.xda-developers.com/show....php?t=1527159)
and then step 2 flashmode original ftf file enough? I don't have to unroot? Then everything is back to original? Without the drm keys ofcourse .

You lost your warranty when you unlocked your bootloader...

DekinGBar said:
You lost your warranty when you unlocked your bootloader...
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Yes i know. I just wanna know if these are the right steps.

you MAY void your warranty
this's not automatic. they are saying you that what you will do now with roms, kernels, recoveries aren't any more their business
if you flash galaxy ace kernel it's a problem of yours
but for example, a warranty claim about the yellow tint of the screen, (i think so) it's going to be accepted
my advice is to relock bootloader, and then flash stock rom (via flashtool)

I don't know how good relocking the bootloader works, so I won't make any promises about that. But about your question about unrooting, flashing the stock (unrooted) ftf is all you have to do. Those are as far as I know the only steps you have to take to get your phone back to as stock as possible.
Having your bootloader unlocked doesn't guarantee that your warranty is voided, so as long as it's a hardware failure you should be OK. Bricking is next to impossible so, software failure shouldn't be that much of a risk.

Thanks everyone for the info.

[Q] at&t bootloader

Googling and searching this website have yielded nothing useful so I figured I'd ask:
Has anyone yet been able to unlock the bootloader on the sm-t807a (the AT&T model of the 805)?
Thanks in advance. I'm just itching debloat this sucker and see what it can really do.

Not yet.

Okay; further query. Does the locked bootloader just mean I'll trip knox if I flash a custom ROM or otherwise acquire root or is it more insidious than that? Because I'll trade my warranty for root any day of the week. Is there absolutely nothing I can do? I can live with just root and not being able to use a custom ROM but I don't know how long I can run this thing without xposed before I lose my mind.

Locked bootloader means nothing will flash unless it stock and signed. There's chance of a brick and/ or end up with Knox tripped just for the he'll of of it.

Has anyone gained any ground on the T-807A as far as unlocking the bootloader. All I can get into is Odin Mode. Is there a fastboot mode? I have two tablets that are locked up and unbootable because of unapproved software. (TWRPn recovery on both occasions)​

Geraldleach2 said:
Has anyone gained any ground on the T-807A as far as unlocking the bootloader. All I can get into is Odin Mode. Is there a fastboot mode? I have two tablets that are locked up and unbootable because of unapproved software. (TWRPn recovery on both occasions)​
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Just flash the stock firmware with odin.

Can I lock my bootloader for Warranty?

Hello guys! I wanna know if I can lock my bootl back is I flash a custom recovery and rom. Can I lock my bootloader and come back to MIUI? Can I use MI flash with option clean and lock with custom recovery? Or I need stock?

SebiC18 said:
Hello guys! I wanna know if I can lock my bootl back is I flash a custom recovery and rom. Can I lock my bootloader and come back to MIUI? Can I use MI flash with option clean and lock with custom recovery? Or I need stock?
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Miflash will replace custom recovery

NickTheSickDick said:
Miflash will replace custom recovery
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And on top of this the answer is that yes if you use mi flash clean and lock option then technically you have warranty back since the phone is locked.
However if the device is compromised to a point where you cannot flash then there's no way to get warranty back.
Tbh the risk is worth it

Dobsgw said:
And on top of this the answer is that yes if you use mi flash clean and lock option then technically you have warranty back since the phone is locked.
However if the device is compromised to a point where you cannot flash then there's no way to get warranty back.
Tbh the risk is worth it
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There's barely a risk with an unlocked bootloader, the real problem arises when you ruin everything with a locked bootloader and you can't even flash anything.

NickTheSickDick said:
There's barely a risk with an unlocked bootloader, the real problem arises when you ruin everything with a locked bootloader and you can't even flash anything.
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That's actually incredibly true for Xiaomi phones.
Seems the majority of issues arise from LB phones that brick and can't be flashed without test point (voiding warranty anyway)

If you have the rights to unlock the bootloader, then even if you keep locked and it bricks, you can unlock and flash a rom again.
In fact even if you don't want a custom rom or root, asking to be able to unlock bootloader is must, just in case.

Just a few doubts regarding Bootloader and rooting

Hey guys, I'm new to the Redmi forums, I've been on XDA since 2012 and have been using mainly Xperia devices.
So just had a few doubts regarding this phone(bought it last week)
I read about the procedure to unlock the bootloader and everything.
1. I know unlocking will void my warranty, but can i then relfash stock rom and relock bootloader to show that the bootloader was never unlocked? We could do that in Xperia.
Is it possible to do it now?
2. Will just rooting require the bootloader to be unlocked? And if yes would the warranty be void if I unlocked the bootloader and just root the phone without flashing custom ROMs?

Unlocking bootlader procedure doesn"t void you warranty. At least in Poland
Rooting requires unlocked bootloader. Im not sure about rooting, but you can always flash offcial miui build and its going to unroot your Redmi and relock you bootloader

piyush95 said:
Hey guys, I'm new to the Redmi forums, I've been on XDA since 2012 and have been using mainly Xperia devices.
So just had a few doubts regarding this phone(bought it last week)
I read about the procedure to unlock the bootloader and everything.
1. I know unlocking will void my warranty, but can i then relfash stock rom and relock bootloader to show that the bootloader was never unlocked? We could do that in Xperia.
Is it possible to do it now?
2. Will just rooting require the bootloader to be unlocked? And if yes would the warranty be void if I unlocked the bootloader and just root the phone without flashing custom ROMs?
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1. As far as I know the warranty is not void. I have not seen any such warning. But please do check from your end.
2. Rooting will need unlocked bootloader if you are doing it via the recovery. Maybe one click root apps wont. I dunno of any one click root apps for RN5 Pro

Unlocking bootloader don't void warranty of xiaomi phones its confirmed
Changes in rom may void warranty like rooting
But u can again clean flash rom with mi flash restore to factory stage is possible

If I lock the bootloader is the warranty still ruined?

I am planning to root my device and I was wondering is the warranty still ruined after locking the bootloader so my question is:
If I lock the bootloader is the warranty still ruined?

Well you don't lose it in the first place. No, unlocking the bootloader doesn't void your warranty.

if you restore MIUI rom and bring back phone to factory system you not loose your warranty, only if you leave unlocked bootloader and custom rom in phone you dont have warrant.

I believe once you unlock bootlaoder service center can check if you did it or not even if you re-lock it.

I believe once you unlock bootlaoder service center can check if you did it or not even if you re-lock it.
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No, if you reflash the firmware, they can't check if you've unlocked it before (if you didn't unlocked officially in the first place).
Well most manufacturers (cheepo ones) do not implemented this kind of tech that persists data over a firmware flash.
Also, most of the time, they don't even check for this.