Some bootloaders are locked by the manufactures to prevent the phones from booting unofficial firmware images.

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What's the security implication of having an unlocked boot loader?

Nexus devices can be unlocked using the fastboot command fastboot oem unlock to install a custom firmware. For security reasons, the phone is wiped when this command is executed. However after this is ...
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0answers
440 views

security implications of unlocking, rooting, cutom recovery, etc [closed]

Just curious. There are lots of posts on the web that talk about the fact that unlocking your bootloader wipes apps and data - presumably to prevent unauthorized access to that info. But in order to ...
24
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2answers
12k views

Why does unlocking the bootloader wipe phone?

I understand that unlocking the bootloader will wipe my Android phone, but have been looking around for why. Seems to be by design, but what is the reasoning for that design? Is it some security ...
3
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1answer
2k views

What exactly gets wiped when unlocking Galaxy Nexus?

I've seen a few guides on how to unlock the Galaxy Nexus to prepare it for rooting, and they say that the fastboot oem unlock command will "wipe your personal data". I'm a little unclear on what gets ...
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1answer
2k views

Error in unlocking bootloader in xperia ray with testpoint method

I was following guide to unlock my bootloader while preserving DRM data. http://androidflip.com/unlock-xperia-phones-bootloader-without-losing-drm-data-track-id-working/ Everything went fine except ...
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1answer
1k views

Can I lock android phone to one network if it is unlocked?

Can I lock android phone to one network? If can be unlocked if I have both lock and unlock code? I want to lock my android phone to use only one network.
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0answers
2k views

SE x10 will no longer boot

I am wondering if anyone can help me with my situation. I was using JAF 2.3.7 Rom for about 3 months with no issues. After installing Prey as well as Dropbox (only 2 new apps) the phone started to ...
1
vote
2answers
28k views

Can I flash CyanogenMod without unlocking bootloader?

With a locked bootloader on an SE ST17i running the rooted Stock Xperia Gingerbread 2.3.4, can I flash the CyanogenMod 9 onto it? Or do I really need my bootloader unlocked? I also have ClockWorkMod ...
3
votes
1answer
503 views

Does the bootloader need to be unlocked to flash my phone

I am not able to relate between bootloader unlocking and flashing. From what I understand, when I flash my phone with a custom ROM, it writes to the /boot partition and hence the bootloader has to be ...
1
vote
0answers
343 views

How do I unlock my bootloader with Omnius?

I want to unlock the bootloader of my Carrier Locked O2-UK Xperia Play. When I go into the service menu and check if my bootloader can be unlocked it says "allowed:no". After further research I found ...
1
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2answers
5k views

Unlock Xperia Play R800i for use with CM9

Is there any way I can unlock the bootloader for my O2 Xperia Play so I can install Cyanogen Mod on it? Sony announced today that they will not be releasing ICS for the Xperia Play. Now I want to ...
3
votes
1answer
1k views

Does Unlocking bootloader affect network lock?

Will the bootloader unlock procedure as shown on the HTC Dev website affect my network lock? I have an HTC Aria, which was originally SIM locked, but I got unlocked from a shop. Now, since I'm ...
4
votes
2answers
32k views

Problem unlocking HTC phone using their fastboot program

According to HTC, my Amaze 4G is fully ready from the factory to be queried for its identifier tolken, but when I run the appropriate command, it doesn't work. I get: $ fastboot oem ...
2
votes
1answer
540 views

Does Sony always check if the bootloader has been unlocked when repairing the phone?

I'd like to unlock my Xperia Neo V's bootloader, but on the other hand I don't want to lose my warranty. Obviously, that isn't possible. So my question is: Do Sony Ericsson's repair centres always ...
12
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4answers
35k views

What does “fastboot oem lock” do?

I've had my phone for months, loading with several firmware, ROMs and OTAs, without ever running this command. What does it do? What I know is that "fastboot oem unlock" displays the confirmation ...
5
votes
1answer
14k views

Problem with unlocking the HTC Wildfire bootloader with HTC unlocker

I tried to unlock HTC bootloader by the official tool but I get to the stage when I issue the command: fastboot oem get_identifier_token Unfortunatly I get error ... (bootloader) [ERR] Command ...
2
votes
0answers
387 views

Unlocking bootloader on Sony Ericsson NEO V

Has anybody managed to use Fastboot on Ubuntu to unlock the Sony Ericsson Neo V? I tried and got the blue led light (bootloader) while connecting the USB. But Fastboot still doesn't recognize the ...
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1answer
1k views

Unlocking the Bootloader on a Nexus One with S-On

I'm interested in rooting my (Very recently bought) nexus one, and installing Cyanogenmod over Fastboot. However, on the boot screen of my device I've noticed the first line tells me that security is ...
3
votes
1answer
2k views

Xperia play bootloader locked?

Hi guys i've been trying for quite a while to unlock the bootloader of the phone i've bought. It's from hong kong and branded to vodafone it's not sim locked as I tried an optus sim and it worked. I ...
4
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1answer
3k views

Does the Samsung Galaxy S II come with an unlocked bootloader?

Does the Samsung Galaxy S II come with an unlocked bootloader as earlier promised by Samsung?
3
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2answers
1k views

How to unlock Nexus S 2.3.3 bootloader without having to wipe all device data?

The usual way is to execute: fastboot oem unlock But this will erase all my private data.