Unlocked bootloader and safety ? - General Questions and Answers

Hello everyone, how safe are devices with an unlocked bootloader?
Are devices more vulnerable with their bootloader unlocked?
What happens when someone unlocks the bootloader of their device?
Does it make sense to install Lineage OS on a device that will then have an unlocked bootloader however with TWRP password protected and not rooted?

IMHO for good reasons Android doesn't come rooted, doesn’t come bootloader-unlocked out of the box: unlocking a phone's bootloader creates severe security risks.

Related

What does the unlocking of the bootloader do?

As the topic says, what does the unlocking of the bootloader do and why do you have to do it? Also does unlocking the bootloader void the warranty?
Sent from my Nexus S using Tapatalk 2
All your answers are here:
http://www.addictivetips.com/mobile...-bootloader-on-android-phones-complete-guide/
And yes, unlocking the bootloader voids your warranty. But on Nexus is really easy to relock it with fastboot oem lock command.
DeuXGod said:
All your answers are here:
http://www.addictivetips.com/mobile...-bootloader-on-android-phones-complete-guide/
And yes, unlocking the bootloader voids your warranty. But on Nexus is really easy to relock it with fastboot oem lock command.
Click to expand...
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Personally, this confuses me more than before. I understand the concept of a bootloader, but not that a customer rom cannot be loaded without it being unlocked. I'm using an ATT Galaxy S5, which as I understand cannot be unlocked. However, my device is rooted and has a custom rom loaded (Dynamic KAT 4.0 NI2 build).
So what exactly does unlocking the bootloading gain over simply rooting and loading a custom rom such as I have done?
Thanks!
Edit: Crap, just realized this is a really old thread. I'll search further...
Different devices have different methods of rooting, the nexus s is one that you need to unlock the bootloader first, then you can root and/or flash a custom ROM, recovery, kernel, etc
Yes some phone don't need you to unlock bootloader and yes some bootloaders can't be unlocked so you're question is device specific in the sense that every device is different

unlocking bootloader ?

>>>>>>>>>>
does rooting an android phone actually unlock the bootloader or it remain locked ?
i will use framaroot for rooting the device
android2020 said:
>>>>>>>>>>
does rooting an android phone actually unlock the bootloader or it remain locked ?
i will use framaroot for rooting the device
Click to expand...
Click to collapse
While you should just google it next time, rooting does not unlock the bootloader.

[Q] Will an unlocked bootloader remain unlocked after Lollipop update?

Hi all,
I have a rooted and unlocked Nexus 5. Just wondering if my bootloader will remain unlocked after Lollipop update, either through OTA or factory image. I need the bootloader to remain unlocked in case an unlocked bootloader becomes the prerequisite for rooting forever.
Thanks!
matthew01202 said:
Hi all,
I have a rooted and unlocked Nexus 5. Just wondering if my bootloader will remain unlocked after Lollipop update, either through OTA or factory image. I need the bootloader to remain unlocked in case an unlocked bootloader becomes the prerequisite for rooting forever.
Thanks!
Click to expand...
Click to collapse
The bootloader will only lock if you specifically lock it using fastboot or an app. No other way
rootSU said:
The bootloader will only lock if you specifically lock it using fastboot or an app. No other way
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Click to collapse
So a locked bootloader remains locked and an unlocked one stays unlocked if I don't change anything in the OTA zip or Factory Image when flashing? Or don't specify it in adb?
matthew01202 said:
So a locked bootloader remains locked and an unlocked one stays unlocked if I don't change anything in the OTA zip or Factory Image when flashing? Or don't specify it in adb?
Click to expand...
Click to collapse
Yes. Though fastboot is not adb. two different things
Thanks!

Unlock Bootloader

Hey guys I'd like to know if i can have future OTA updates after unlocking bootloader (NO TWRP & ROOT) just unlocking

Few questions about relocking bootloader

I am considering relocking the bootloader for my HTC U12+. I unlocked it a long time ago (out of habit I guess). So my phone is completely running stock without any modifications. I want to relock the phone to get widewine back to L1, so I'll get Netflix updates and such.
A few questions about relocking that I couldn't find an answer to.
1. When I relock the bootloader will it do a factory reset to the phone? I'm asking because unlocking did.
2. If later on I decide to unlock the relocked bootloader again, do I have to get another unlock-code from HTC? Or is unlocking a relocked bootloader a simpler procedure?
So I decided to do the relocking. During the relocking procedure I was being told on the screen that the phone will be wiped if I continue. It remains to be seen how I'll unlock it later on if I want to.
lvl3 said:
I am considering relocking the bootloader for my HTC U12+. I unlocked it a long time ago (out of habit I guess). So my phone is completely running stock without any modifications. I want to relock the phone to get widewine back to L1, so I'll get Netflix updates and such.
A few questions about relocking that I couldn't find an answer to.
1. When I relock the bootloader will it do a factory reset to the phone? I'm asking because unlocking did.
2. If later on I decide to unlock the relocked bootloader again, do I have to get another unlock-code from HTC? Or is unlocking a relocked bootloader a simpler procedure?
Click to expand...
Click to collapse
2. You have to to go through the HTCDev website procedure (not sure if you can reuse the previous Unlock_code.bin file).
is it possible to get "locked bootloader" instead of "relocked bootloader" and get rid of system status modified?
maslaq said:
is it possible to get "locked bootloader" instead of "relocked bootloader" and get rid of system status modified?
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Click to collapse
No.

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