Mobistel Cynus f8 (Mt6582) unlock bootloader - Android Q&A, Help & Troubleshooting

Hi i got this phone and i would like to unlock the bootloader, ive tried it with adb (fastboot oem unlock) while phone is in fastboot mode, it askes me if i want to unlock the bootloader (if yes i i should press vol+ , if not vol-). i did pressed volume up bot the phone doesnt make does not react on the command, on the other side if i press the volume down button it cancel the request.
any suggestion whats the problem ?
regards

superwurm123 said:
Hi i got this phone and i would like to unlock the bootloader, ive tried it with adb (fastboot oem unlock) while phone is in fastboot mode, it askes me if i want to unlock the bootloader (if yes i i should press vol+ , if not vol-). i did pressed volume up bot the phone doesnt make does not react on the command, on the other side if i press the volume down button it cancel the request.
any suggestion whats the problem ?
regards
Click to expand...
Click to collapse
If the phone has a removable battery, remove it for 5mins and insert and try again. If that doesn't work, try using mtkdroidtools, it should work for your mtk model. If not, please reply as soon as possible with log cat.

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When we use flash tool will ask to press and hold back button so for SE WT19i which button we need to press.
---------- Post added at 01:21 AM ---------- Previous post was at 01:10 AM ----------
I cannot find place to type.
It is very possible that the volume up key does the job.
the volume up key doesn't seem to work... any ideas why is it?
zakkwilde979 said:
the volume up key doesn't seem to work... any ideas why is it?
Click to expand...
Click to collapse
Do you mean that it doesn't work when the device has loaded android?
If yes, then reflash the official kernel and see if the problem persisits.
If the problem persists then it is very possible that you have a hardware failure...
If you have flashed my kernel and you mean that you cannot enter CWM by pressing volume up, just press the power on-off key once or two, when the (white)
se logo turns brighter and you will enter CWM.
i mean, i cant get into fastboot mode by clicking the volume up key so i cant flash any rooms
think that i had unlocked the bootloadrer i used the test point method with s1tool( http://forum.xda-developers.com/show....php?t=1285285 ) it didn't gave me any error message, it looked like it worked fine, tried volume up volume down even the home button and various combinations of it... the volume buttons load the CWM and if i restart holding the volume up key it boots into charging mode...
zakkwilde979 said:
i mean, i cant get into fastboot mode by clicking the volume up key so i cant flash any rooms
think that i had unlocked the bootloadrer i used the test point method with s1tool( http://forum.xda-developers.com/show....php?t=1285285 ) it didn't gave me any error message, it looked like it worked fine, tried volume up volume down even the home button and various combinations of it... the volume buttons load the CWM and if i restart holding the volume up key it boots into charging mode...
Click to expand...
Click to collapse
I can't understand a few things about your case.
Have you already flashed my kernel?
What version of CWM are you running?
To enter fastboot mode you have to connect the usb cable to your device,hold the volume up key and connect the usb cable to your computer.Then the led light turns blue...
i didn't flashed the kernel because i can't boot into fastboot mode, maybe because the test point method with s1tool didn't unlocked the bootloader, but it looked like it did?
i am using the cwm version 5.0.2.7
zakkwilde979 said:
i didn't flashed the kernel because i can't boot into fastboot mode, maybe because the test point method with s1tool didn't unlocked the bootloader, but it looked like it did?
i am using the cwm version 5.0.2.7
Click to expand...
Click to collapse
You can enter fastboot mode, even if your bootloader is locked.You can't install custom kernel though.
Dial *#*#7378423#*#*
Go to service info, go to Configuration submenu and check the status of your bootloader.
If the text under rooting status is:
Bootloader unlocked:Yes
then your bootloader is unlocked.
If the text is:
Bootloader unlock allowed:yes
then the bootloader is still locked.
About getting in fastboot mode now.Try searching the web on how wt19i gets into fastboot mode.
Visit this page also:http://unlockbootloader.sonyericsson.com/instructions
mine says Bootloader Unlock Allowed: No
saw somewhere that it means that the bootloader is unlocked?
the only 2 methods that i can find for booting into fastmode is the volume up key method mekes it go into charging mode (it shows sony ericson on the screen as usual then it shows up a battery with a power logo in the middle)and i saw someone say that he entered fastboote by holding volume up + home key and connecting it to the pc, both didn't worked?
zakkwilde979 said:
mine says Bootloader Unlock Allowed: No
saw somewhere that it means that the bootloader is unlocked?
the only 2 methods that i can find for booting into fastmode is the volume up key method mekes it go into charging mode (it shows sony ericson on the screen as usual then it shows up a battery with a power logo in the middle)and i saw someone say that he entered fastboote by holding volume up + home key and connecting it to the pc, both didn't worked?
Click to expand...
Click to collapse
u need jinx13
zakkwilde979 said:
mine says Bootloader Unlock Allowed: No
saw somewhere that it means that the bootloader is unlocked?
the only 2 methods that i can find for booting into fastmode is the volume up key method mekes it go into charging mode (it shows sony ericson on the screen as usual then it shows up a battery with a power logo in the middle)and i saw someone say that he entered fastboote by holding volume up + home key and connecting it to the pc, both didn't worked?
Click to expand...
Click to collapse
Try visiting this page and read carefully the second step:http://unlockbootloader.sonyericsson.com/instructions
Your bootloader is still locked and cannot be unlocked.
Sorry...
This method also work with 4.0.2.A.0.62 version.
http://forum.xda-developers.com/showthread.php?t=1439311
Cheers !!!

[Q] Enter in fastboot mode ?

Guys, can anyone tell how easily enter in fastboot mode ? When Press Volume down & power button simultaneously phone open normally. Bootloader already unlocked officially. Thx in advance.
The search function is a magical thing. I think that you should try it.
Emrul said:
Guys, can anyone tell how easily enter in fastboot mode ? When Press Volume down & power button simultaneously phone open normally. Bootloader already unlocked officially. Thx in advance.
Click to expand...
Click to collapse
Vol Button UP only and insert USB cable (no power button)

[Q] New replacement phone, cannot get into recovery

Just got a replacement phone from Sprint and have activated it.
Wanted to do a simple HTCDev.com unlock for the ability to do a few things that require root..
From being powered off, I hold down the Down Volume and them press and hold the Power button but that doesn't work... The three icons (buttonless buttons) flash a number of times but no matter how long I hold down those two buttons, the phone won't boot into the bootloader.
And YES, FASTBOOT is unchecked ....
Any ideas? I've rooted a number of phones and it's usually the 'hold down the down volume + power' until it boots into the bootloader...
Not this one...
HELP!
Turn off fastboot in settings and if you still can't, use adb tools or sdk and type adb reboot bootloader
om4 said:
Turn off fastboot in settings and if you still can't, use adb tools or sdk and type adb reboot bootloader
Click to expand...
Click to collapse
As mentioned above, Fastboot is off...
I finally was able to get into the bootloader ... I let got of the power button and down volume when the three non-button buttons started flashing... The third time it went into the bootloader...
Weird...

fastboot issue

i want to enter fastboot mode to unlock bootloader
but i press volume + and plugin usb,it won't blink blue led,it blink green and orange,and nothing happened
help.....
and another problem,isn't you can't unlock bootloader when you already rooted
beucase i success for using boot manager to enter fastboot mode, it blink blue led
The LED should be blue and that's it, so if it shows any other color when you hold VOL UP, then I have no idea what's going on, or what you've previously done to your device.
Hi
I have same problem.
no solution ? i really need this.
Use the cable that came with the phone.
rickgillyon said:
Use the cable that came with the phone.
Click to expand...
Click to collapse
I used 3 cable such as my phone's original cable but not working.
It directly boot into flash mode if i press and hold volume up/down
I can flash ftf , but can't root or unlock or flash recovery
Any idea ?
I have the same problem here. When i want to unlock bootloader at the step "connect to fastboot Mode" i connect, whatever i do. My Phone boot in flashmode. I go to philz touch recovery, and reboot Phone in fastboot Mode, he is booting automaticly in flashmode. Anyone have A idea how i can fix this?
Up Up Up
tenkokuugen said:
i want to enter fastboot mode to unlock bootloader
but i press volume + and plugin usb,it won't blink blue led,it blink green and orange,and nothing happened
help.....
and another problem,isn't you can't unlock bootloader when you already rooted
beucase i success for using boot manager to enter fastboot mode, it blink blue led
Click to expand...
Click to collapse
Do you already instal fastboot driver in your pc for your device...?

Can't enter recovery due to bootloader warning.. what to do?

Hi,
I just flashed Nougat KDZ on my H850, now trying to root the phone.
What I do:
adb reboot bootloader
fastboot flash recovery twrp-3.0.2-1-h850.img
disconnect cable
remove battery and put back
hold volume down + power
when I see LG, I quickly release power and press again and hold
then this stupid bootloader warning screen appears (that the data can't be verified) and it won't enter recovery..
What am I missing here?...
Thanks!
Never mind, got it.
I don't know where I read about the remove\insert battery thing..
"fastboot reboot" after twrp flash solved it for me.

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