Develop Bugs

[Q] Install ROM with locked bootloader

I have unlocked my bootloader to root and install CWM. I have installed CM9 and now I want to give AOKP a go. Since installing CM9 I have relocked my bootloader, just for the sake of it. Can I install the AOKP via update.zip without needing to unlock the bootloader again, or do I necessarily have to have it unlocked?
There is a program in the market that lets you lock and unlock without even restarting the phone, so it's not about having to unlock it. It's just more of a proof of concept kind of question
Thanks
Aphis

IonAphis said:
I have unlocked my bootloader to root and install CWM. I have installed CM9 and now I want to give AOKP a go. Since installing CM9 I have relocked my bootloader, just for the sake of it. Can I install the AOKP via update.zip without needing to unlock the bootloader again, or do I necessarily have to have it unlocked?
There is a program in the market that lets you lock and unlock without even restarting the phone, so it's not about having to unlock it. It's just more of a proof of concept kind of question
Thanks
Aphis
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Dont think you need to relock it as long as you have recovery already.. that would be the only reason to unlock it in the first place as far as im concerned. You should be fine.

is unlocking bootloader a must?

I purchase a 1+3 a week ago. I have everything setup has i wanne but my concern if the phone goes into bootloop or something goes wrong. Would u think im ok woth a locm bootloader or unlock bootloader is a must

Unlocking bootloader is only necessary if you want/need root and other modifications. If you're satisfied with the phone in its current state and only plan to use official ROMs, you don't need to unlock it.
Bootloops an similar issues are very rare on unmodified devices, no need to worry about this.
Besides, you can always factory reset or sideload stock ROM even with locked bootloader and stock recovery.
Sent from my OnePlus 3 using Tapatalk

If I relock the bootloader the room and the root will stay?

I want custom rom, root and exposed,
But there is the warning of the unlocked bootloader on every boot.
What is the most I can get without this warning?
Thanks a lot.

Nothing wrong.. Tbh I really like that warning since you can easily navigate to recovery, Fastboot etc. Just ignore that warning.

yossi787 said:
I want custom rom, root and exposed,
But there is the warning of the unlocked bootloader on every boot.
What is the most I can get without this warning?
Thanks a lot.
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Click to collapse
DON'T relock the bootloader as long as your system is modified in any way (custom rom, root ...).
Don't care about the warning, without it you can get absolutely nothing, but using the unrooted stock firmware.

This warning is shown on every thread describing how to unlock the bootloader - if you lock the bootloader with anything that isn't the stock ROM/recovery, then you will brick your device

I personally, have never had any problems with the adb command to lock and unlock the bootloader. The bootloader actually operates independently of the software running. However, why would you want to relock the bootloader, particularly if you intend to flash other ROMs.

jim262 said:
I personally, have never had any problems with the adb command to lock and unlock the bootloader. The bootloader actually operates independently of the software running. However, why would you want to relock the bootloader, particularly if you intend to flash other ROMs.
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Click to collapse
I don't like the idea that everyone can wipe my device. I have little brothers and they can do that by accident...

yossi787 said:
I don't like the idea that everyone can wipe my device. I have little brothers and they can do that by accident...
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Click to collapse
That doesn't depend on a locked bootloader. You CAN'T protect android phones from beeing wiped.

LS.xD said:
That doesn't depend on a locked bootloader. You CAN'T protect android phones from beeing wiped.
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Click to collapse
Of course, but from this warning that can happen by accident...

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.

CustomROM possible without root and (re)locked bootloader?

Hi,
Long story short:
is it possible to install customROM without root and to (re)lock the bootloader, and are there experiences with a similar situation where Apps check for closed bootloader and root (and stop working if detected)?
=> Goal: activate WiFi-Calling as my provider tuned down 2G-transmitpower due to the 5G-advances (without having enough 3G-coverage to make calls on UMTS-net)... BUT: I'm using two banks; one uses a PhotoTAN-App, that stops working if it detects an open Bootloader, the other Bank-App checks for Root & open Bootloader, and likewise stops working if detected. I have no idea about the PhotoTAN and Magisk, but the 2nd bank confirmed they checked rooted devices with Magisk, and that it does not work with it....
Thus, if I go for a CustomROM, I need to be sure that I can run it unrooted and with a locked bootloader....
Is there a way to install a CustomROM on the 5X with (re)locked bootloader and without root?
(or, if not possible: is there a way I can activate WiFi-Calling on StockROM if said one does not have the Carrier-Entitlements?)
Thanks for the help

@theunlucky: you don't need root to flash a custom ROM, only an unlocked bootloader. IMO you can lock it after flashing ROM.

rp158 said:
@theunlucky: you don't need root to flash a custom ROM, only an unlocked bootloader. IMO you can lock it after flashing ROM.
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Are you sure about locking the bootloader after flashing a CustomROM? I've read several threads now, and it seems a locked BL only works with StockROM?

Not sure, therefore IMO IMO a locked BL prevents flashing CustomROM, not running. Try. If it doesn't work, you unlock BL again (triggers factory reset). In the worst case you've to flash latest firmware for a clean base..