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Question [Q] Why do we need to unlock the bootloader before rooting?

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kal27

Senior Member
Jul 22, 2012
80
4
ASUS ROG Phone 5
hi! so i just bought my rog phone 5, coming from xperia z (yeah i know). so based on my experience using xperia phone, rooting doesnt require unlocked bootloader, right? or did i just forget it coz im using custom roms?

im just not ready to unlock the bootloader and I WANT ROOT. theres so many ads
 

aimsjahan

Member
Sep 20, 2013
38
5
OnePlus X
OnePlus 5
hi! so i just bought my rog phone 5, coming from xperia z (yeah i know). so based on my experience using xperia phone, rooting doesnt require unlocked bootloader, right? or did i just forget it coz im using custom roms?

im just not ready to unlock the bootloader and I WANT ROOT. theres so many ads
AFAIK, unlocking bl is a prerequisite for rooting. Or else, the device wouldn't be able to execute 'fastboot flash' or 'fastboot boot' adb commands.

As for the ad issue, try 'dns.adguard.com' w/o quotes as private dns address (dns over tls).
 
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m8822

Senior Member
May 6, 2016
59
43
OnePlus 7T Pro
because you need to modify the boot partition by flashing the patched boot. hence it has to be unlocked. otherwise you will not be able to flash the patched boot.

as simple as this.
 
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    hi! so i just bought my rog phone 5, coming from xperia z (yeah i know). so based on my experience using xperia phone, rooting doesnt require unlocked bootloader, right? or did i just forget it coz im using custom roms?

    im just not ready to unlock the bootloader and I WANT ROOT. theres so many ads
    AFAIK, unlocking bl is a prerequisite for rooting. Or else, the device wouldn't be able to execute 'fastboot flash' or 'fastboot boot' adb commands.

    As for the ad issue, try 'dns.adguard.com' w/o quotes as private dns address (dns over tls).
    1
    because you need to modify the boot partition by flashing the patched boot. hence it has to be unlocked. otherwise you will not be able to flash the patched boot.

    as simple as this.
    1
    By default, the bootloader only supports official signed images from the manufacturer. Since no engineering bootloader is available and we don't have the signing tools, the next best thing is to disable the restriction.