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[Development] How to unlock and relock Android bootloader with fastboot

[Development] How to unlock and relock Android bootloader with fastboot

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hovatek
hovatek
hovatek
Administrator
49,570
10-07-2018, 11:16 AM
#11



(09-07-2018, 09:42 PM)belinda1093 Great post, I am a newbie and it took me two days to get this far. I use both linux and windows and first a lot of problems with the adb fastboot drivers...and all the familiar problems. Then after much hassle I found out that my bootloader is already unlocked and I thought it wasn't. Big Grin Big Grin
Now my biggest issue is that I cannot find a suitable custom ROM for my phone (strange device I have, a Mango C9 android marshmallow, kernel 3.10.65 (!) with quad core chipset). So I should learn how to port a Rom, but I am in a hurry because I started this whole process because my phone has a virus in android system file. So I have to completely wipe it clean. I cant find a stock rom either. What would your advice be?

Please, create a new thread so we can help
see https://www.hovatek.com/forum/thread-514.html for how to create a thread

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Dafi11
Dafi11
Dafi11
Enthusiastic Member
8
24-08-2018, 02:52 AM
#12
I've done this before, but when I type 'Fastboot OEM unlock', my device asks to press the volume up button for yes, and the volume down to not. when I press the volume up button then nothing happens, as if the volume up button doesn't work. But the volume down works well. how to handle it?
This post was last modified: 24-08-2018, 02:54 AM by Dafi11.
xerxes
xerxes
xerxes
Senior Member
8,355
24-08-2018, 03:59 PM
#13
(24-08-2018, 02:52 AM)Dafi11 I've done this before, but when I type 'Fastboot OEM unlock', my device asks to press the volume up button for yes, and the volume down to not. when I press the volume up button then nothing happens, as if the volume up button doesn't work. But the volume down works well. how to handle it?

if you press the vol down does it terminate the unlock process?
freshtyt
freshtyt
freshtyt
Senior Member
2,949
24-08-2018, 04:34 PM
#14
(24-08-2018, 02:52 AM)Dafi11 I've done this before, but when I type 'Fastboot OEM unlock', my device asks to press the volume up button for yes, and the volume down to not. when I press the volume up button then nothing happens, as if the volume up button doesn't work. But the volume down works well. how to handle it?

did you enable oem unlock in settings?
also why are you trying to unlock bootloader?
Dafi11
Dafi11
Dafi11
Enthusiastic Member
8
24-08-2018, 07:37 PM
#15



(24-08-2018, 03:59 PM)innagee
(24-08-2018, 02:52 AM)Dafi11
I've done this before, but when I type 'Fastboot OEM unlock', my device asks to press the volume up button for yes, and the volume down to not. when I press the volume up button then nothing happens, as if the volume up button doesn't work. But the volume down works well. how to handle it?


if you press the vol down does it terminate the unlock process?

No. If I press the volume down button, the process will display several options, such as rebooting device, recovery mode and fastboot mode. but strangely, when this process the two volume buttons don't work at all

Dikirim dari Lenovo A6600d40 menggunakan Hovatek Mobile
maxpayne
maxpayne
maxpayne
Contributor
2,873
24-08-2018, 08:57 PM
#16
(24-08-2018, 07:37 PM)Dafi11 No. If I press the volume down button, the process will display several options, such as rebooting device, recovery mode and fastboot mode. but strangely, when this process the two volume buttons don't work at all

Dikirim dari Lenovo A6600d40 menggunakan Hovatek Mobile

Is OEM unlocking enabled under USB Debugging?
Why are you trying to unlock bootloader exactly?
What is your device's chipset?

Sent from my Infinix X510 using Hovatek Mobile
Dafi11
Dafi11
Dafi11
Enthusiastic Member
8
25-08-2018, 01:33 AM
#17
This my detaile problem
https://www.hovatek.com/forum/showthread...#pid145172

My chipset is MTK6735

Dikirim dari Lenovo A6600d40 menggunakan Hovatek Mobile
This post was last modified: 25-08-2018, 01:36 AM by Dafi11.
hovatek
hovatek
hovatek
Administrator
49,570
25-08-2018, 08:45 PM
#18
(25-08-2018, 01:33 AM)Dafi11 This my detaile problem
https://www.hovatek.com/forum/showthread...#pid145172

My chipset is MTK6735

Dikirim dari Lenovo A6600d40 menggunakan Hovatek Mobile

Please, stick to the thread you've created

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Falkentyne
Falkentyne
Falkentyne
Newbie
2
16-09-2018, 08:06 PM
#19
Does this method work on the LG G7 G710EAW (Asian/HK) version?
OEM unlock is enabled in developer options.

But the phone's service menu says bootloader unlock "Doesnot support device"
And LG's forum submission on their website says this model is not supported.

*edit*
The commands fail.

C:\Android\tools\bin>fastboot oem unlock
...
FAILED (remote: unknown command)
finished. total time: 0.001s

C:\Android\tools\bin>fastboot oem unlock-go
...
FAILED (remote: unknown command)
finished. total time: 0.001s
This post was last modified: 16-09-2018, 08:47 PM by Falkentyne.
hovatek
hovatek
hovatek
Administrator
49,570
17-09-2018, 04:50 PM
#20



(16-09-2018, 08:06 PM)Falkentyne Does this method work on the LG G7 G710EAW (Asian/HK) version?
OEM unlock is enabled in developer options.

But the phone's service menu says bootloader unlock "Doesnot support device"
And LG's forum submission on their website says this model is not supported.

*edit*
The commands fail.

C:\Android\tools\bin>fastboot oem unlock
...
FAILED (remote: unknown command)
finished. total time: 0.001s

C:\Android\tools\bin>fastboot oem unlock-go
...
FAILED (remote: unknown command)
finished. total time: 0.001s

As stated, this method doesn't work on all devices

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