Do you need an unlocked bootloader to use fastboot? - Sony Xperia S, Acro S, Ion

Ive been trying to get fastboot to work on my phone for weeks, no methods on this site have worked. Ive tried another pc with windows 7 and its the same story. I have rooted my phone but I kept the bootloader locked. Is an unlocked bootloader an necessity for fastboot or am I missing something?
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AndrewMPhoto said:
Ive been trying to get fastboot to work on my phone for weeks, no methods on this site have worked. Ive tried another pc with windows 7 and its the same story. I have rooted my phone but I kept the bootloader locked. Is an unlocked bootloader an necessity for fastboot or am I missing something?
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
you must have the fastboot and flashmode drivers installed on your pc ,and the xperia s drivers also.....
you enter fastboot when you turn off your phone and you have to press volume up while you connect your usb to pc and you see a blue led .....
i assume fastboot is working before you unlock your bootloader as you unlock the bootloader using fastboot...
what do you want fastboot?

devilakos said:
you must have the fastboot and flashmode drivers installed on your pc ,and the xperia s drivers also.....
you enter fastboot when you turn off your phone and you have to press volume up while you connect your usb to pc and you see a blue led .....
i assume fastboot is working before you unlock your bootloader as you unlock the bootloader using fastboot...
what do you want fastboot?
Click to expand...
Click to collapse
I want fastboot to install custom roms on my device. I could use a hand getting the drivers to work.
My system is windows 8 which is know there is issues with but i have tried:
Plugging phone in while holding volume button.
Lights comes on green and windows sees the device.
Right click and click update.
Select the drivers and select bootloader interface
plug the phone back in and click next
Then the update fails.
Any thoughts?

You need to disable driver signature verification. Do an advanced restart from windows 8, from there there is an option to disable it. After that you should be able to install the drivers fine.

fareeed said:
You need to disable driver signature verification. Do an advanced restart from windows 8, from there there is an option to disable it. After that you should be able to install the drivers fine.
Click to expand...
Click to collapse
i forgot to mention i have tried that also. I've stumped. I don't know why none of the methods aren't working for me haha!

AndrewMPhoto said:
i forgot to mention i have tried that also. I've stumped. I don't know why none of the methods aren't working for me haha!
Click to expand...
Click to collapse
Give this a read and a watch - http://forum.xda-developers.com/showthread.php?t=2044804

AndrewMPhoto said:
Ive been trying to get fastboot to work on my phone for weeks, no methods on this site have worked. Ive tried another pc with windows 7 and its the same story. I have rooted my phone but I kept the bootloader locked. Is an unlocked bootloader an necessity for fastboot or am I missing something?
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
You can not unlock the bootloader without fastboot.
Some phones can access fastboot some are locked out. Chances are, if you paid a discount price through your carrier, your phone has fastboot blocked. If you bought the unlocked full price version you should have access.
You can check if the phone can access fastboot. With the phone off, press volume up and plug into a charger/pc. Do you get the blue led on phone? If no blue led then pc drivers won't help.
~Jaramie
sent by my ION

Thanks for your help, the light is green so im guessing I dont have fastboot. Is there any other ways I can install custom roms to my phone? Or un block fastboot?
Sent from my LT26i using xda app-developers app

I have the same problem! im so sad, im going to seel this one and buy an unlocked one.

If you are with windows 8 connect your phone by an usb 2.0 port. This solve your problem. Fastboot, flash mode and software like Emma, flashtool doesn't support usb 3.0 with windows 8.
Best regards
Look the end of that post

AndrewMPhoto said:
Thanks for your help, the light is green so im guessing I dont have fastboot. Is there any other ways I can install custom roms to my phone? Or un block fastboot?
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
Make sure your pressing the volume up button to enter fastboot mode, blue led. If you press the down button you should get the green led for flash mode. They are different modes. Flash mode is for .ftf files. Fastboot is for .sin files.
From the dialer enter *#*#service#*#* or *#*#7378423#*#* then click on configuration. This will tell you if you can unlock or not.
~Jaramie
sent by my ION

I do t use usb 3.0 with my phone. All I want to know at this point is since my phone is with o2 and my bootloader is locked has fastboot also been locked? My phone is rooted, there must be a way to unblock fastboot if that is the case
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Hmm, nothing happens at all when I hold the vol up key my phone just boots as normal
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AndrewMPhoto said:
Hmm, nothing happens at all when I hold the vol up key my phone just boots as normal
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
Then no fastboot. My AT&T branded Ion is this way. When I do the service code in previous post, configuration shows bootloader unlockable NO. Means no official unlock, no unofficial way yet to unlock at all
~Jaramie
sent by my ION
Xperia SOFT-BRICK Recovery Thread

Mann thats lame. Hopefully there will be an unofficial way at some point!
Sent from my LT26i using xda app-developers app

Related

Question about installing kernel

I was trying to installing arcknight kernel..
And by doing this you have to go fastboot which i believe is turning off ur phone and plug the usb while holding the back key after that u have to type fastboot flash boot (name of kernel.img) and it says waiting for device.. ive been waiting for like 10 minutes nd nothings happening..my phone remains black but the led is green..sometimes changing to blue then back to green..
Am i forgetting something or skipped a process?
Sent from my LT18i using XDA Premium App
no,if you do that using flashtool you have not to hold the back key.after your phone is connected being recognized by flashtool you have to chose fastboot mode then reboot in fastboot mode(via ADB) that willsend your phone in to fastboot mode then you can select a kernel to flash it!
Fastboot is hold options button and led goes blue.
If Ied is green your are in flash mode.
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boxgot said:
no,if you do that using flashtool you have not to hold the back key.after your phone is connected being recognized by flashtool you have to chose fastboot mode then reboot in fastboot mode(via ADB) that willsend your phone in to fastboot mode then you can select a kernel to flash it!
Click to expand...
Click to collapse
Im not using a flashtool.. im in the cmd method..
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zolaisugly said:
Fastboot is hold options button and led goes blue.
If Ied is green your are in flash mode.
Sent from my LT18i using xda premium
Click to expand...
Click to collapse
Yah.. when i connect the phone its green..so im in the flash mode.. but how to go in fastboot? I followed the steps correctly but still in green..
So by the fastboot i will hold the OPTION KEY instead of back key while connecting the usb?
Can u teach me the exact instructions and its every detail?
DO i need my bootloader to be unlocked?
Sent from my LT18i using XDA Premium App
first of all is your bootloader unlocked or not custon kernels cannot be installed on locked bootloaders.
so if its unlocked press menu key and and attach cable to enter fast boot mode and then u can flash custom kernel by cmd line method or flashtool ( more convenient IMHO) .
for archnight kernel after u flash kernel u need to flash WiFi modules in CWM.
arcsuser said:
DO i need my bootloader to be unlocked?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1304634

Phone wont stay in fastboot?

im trying to unlock the bootloader but everytime i connect the phone the LED goes blue for 5 seconds then goes back to the charging screen. ive tried multiple drivers and even disabled driver certificates in windows 8. i just cant get this to work.
Try installing the android 4.x drivers through sdk.
Sent from my LT26i using Tapatalk 2
bobbycarver said:
im trying to unlock the bootloader but everytime i connect the phone the LED goes blue for 5 seconds then goes back to the charging screen. ive tried multiple drivers and even disabled driver certificates in windows 8. i just cant get this to work.
Click to expand...
Click to collapse
You have to put W8 in testmode to be able to install all proper drivers
You can Google how to do it, it's easy then just install the drivers from flashtool/driver folder
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Done that and still not staying in fastboot
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bobbycarver said:
Done that and still not staying in fastboot
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
Are u pressing the power key along wid vol up key while trying to enter into fastboot?
If yes then dun press power key
If no then who knows
Open flashtool window and then connect in fastboot
Sent from my ST25i using Tapatalk 2
drsanket_xperia_u said:
Are u pressing the power key along wid vol up key while trying to enter into fastboot?
If yes then dun press power key
If no then who knows
Open flashtool window and then connect in fastboot
Sent from my ST25i using Tapatalk 2
Click to expand...
Click to collapse
I had the same problem with my cousin's pc, and a friend is also having it. I think you should force the reinstall of all drivers (if you're on Win 8, don't forget to disable signature driver check)
Sent from my LT26i using Tapatalk
Sorted it,.flashtool done a manual install of all drivers which solved the problem
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bobbycarver said:
im trying to unlock the bootloader but everytime i connect the phone the LED goes blue for 5 seconds then goes back to the charging screen. ive tried multiple drivers and even disabled driver certificates in windows 8. i just cant get this to work.
Click to expand...
Click to collapse
Try with a different usb port and if that dosen't works out then try a different pc.
Sent from my LT26i using xda premium
What phone is it? If it's an ion you wont get fastboot
Sent from my LT28at using xda app-developers app
I am also facing the same problem. my device is redmi note 4.my device is also not staying in fastboot mode for long.it quickly comes back to the charging screen. i need help.

no fastboot

Hi, i have an xperia play r800i and i recently unlocked bootloader, installed CM, and then had to reinstall stock firmware and relock bootloader. Now, i have unlocked my bootloader to reinstall CM (I know it seems silly) but flashtools says i'm connected in flash mode no matter what button i've held during connection and i've tried every button on it and each one connects in flash mode.
Thanks for any help
luke.berry said:
Hi, i have an xperia play r800i and i recently unlocked bootloader, installed CM, and then had to reinstall stock firmware and relock bootloader. Now, i have unlocked my bootloader to reinstall CM (I know it seems silly) but flashtools says i'm connected in flash mode no matter what button i've held during connection and i've tried every button on it and each one connects in flash mode.
Thanks for any help
Click to expand...
Click to collapse
Maybe drivers is the problem Reinstall fastboot drivers
Sent from my Xperia Play using xda premium
raminta said:
Maybe drivers is the problem Reinstall fastboot drivers
Sent from my Xperia Play using xda premium
Click to expand...
Click to collapse
Didn't work.
fixed
Turned out i had the wrong build, ended with .62 so i flashed .42 from xperiagamer.com and all good.
Thankyou raminta for your help.

[Q] Sony Xperia S Unlock BOatloader

hi guyz i have xperia s LT26 and i have to flash a custom rom but problem is that i cant unlock my boatloader. please guyz help me out how can i unlock the boatloader i tried alot but nothing works.. just writing waiting for deviec
Mansoor1223 said:
hi guyz i have xperia s LT26 and i have to flash a custom rom but problem is that i cant unlock my boatloader. please guyz help me out how can i unlock the boatloader i tried alot but nothing works.. just writing waiting for deviec
Click to expand...
Click to collapse
Here : http://unlockbootloader.sonymobile.com/
Mansoor1223 said:
hi guyz i have xperia s LT26 and i have to flash a custom rom but problem is that i cant unlock my boatloader. please guyz help me out how can i unlock the boatloader i tried alot but nothing works.. just writing waiting for deviec
Click to expand...
Click to collapse
See here
http://forum.xda-developers.com/showthread.php?p=31376290
Sent from my LT26ii using xda app-developers app
not worked
pracas said:
See here
http://forum.xda-developers.com/showthread.php?p=31376290
Sent from my LT26ii using xda app-developers app
Click to expand...
Click to collapse
hello,, i checked my device there is written Bootloader Unlock Allowed:Yes and when i use standart method or unlocking bootloader so it doesnt works,,, and now i use flash tool to unlock it but when i connected it in flashmode so there was written you device cannot be officialy unlocked... so guys please tell me and show me usb drivers for windows 7 to support device in fastboot mode please help
Mansoor1223 said:
hello,, i checked my device there is written Bootloader Unlock Allowed:Yes and when i use standart method or unlocking bootloader so it doesnt works,,, and now i use flash tool to unlock it but when i connected it in flashmode so there was written you device cannot be officialy unlocked... so guys please tell me and show me usb drivers for windows 7 to support device in fastboot mode please help
Click to expand...
Click to collapse
If your device says bootloader unlocked allowed= yes, then I suggest you to use that tool which is explained at the previous link. I unlocked my bootloader using that. Believe me that really works!
Sent from my LT26i using xda app-developers app
drivers issue
pracas said:
If your device says bootloader unlocked allowed= yes, then I suggest you to use that tool which is explained at the previous link. I unlocked my bootloader using that. Believe me that really works!
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
but bri there is drivers issue,,, when i connect it in fastboot mode so when computer driver installation starts the device blue light goes red and start charging and the driver installation proceess goes cancel... please show me a software which includes every driver so it can support/detect my device in fastboot mode.... in flashtool there is written your device cannot be officialy unlocked
Mansoor1223 said:
but bri there is drivers issue,,, when i connect it in fastboot mode so when computer driver installation starts the device blue light goes red and start charging and the driver installation proceess goes cancel... please show me a software which includes every driver so it can support/detect my device in fastboot mode.... in flashtool there is written your device cannot be officialy unlocked
Click to expand...
Click to collapse
To install fastboot drivers you have to be very fast, 2 or 3 times practice is necessary. Going to device manger install your driver so quickly then you can get your phone at fastboot mode easily. You won't get time more than 3 to 4 seconds.....!
I think, you already have fastboot drives downloaded at your PC, thanks!
If the problem again remains, please update your flashtool...! This also may be an issue.
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noting works
pracas said:
To install fastboot drivers you have to be very fast, 2 or 3 times practice is necessary. Going to device manger install your driver so quickly then you can get your phone at fastboot mode easily. You won't get time more than 3 to 4 seconds.....!
I think, you already have fastboot drives downloaded at your PC, thanks!
If the problem again remains, please update your flashtool...! This also may be an issue.
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
bro even it tried more than 20 times but problem remains the same,, it was same as my htc,, my htc had the same problem but once i tried and done,,, i have some experience in flashing and rooting but this xperia annoyes me alot.... please help me,,, show me the drivers,,,,
Mansoor1223 said:
bro even it tried more than 20 times but problem remains the same,, it was same as my htc,, my htc had the same problem but once i tried and done,,, i have some experience in flashing and rooting but this xperia annoyes me alot.... please help me,,, show me the drivers,,,,
Click to expand...
Click to collapse
You can find driver installer in flashtool driver, just locate your flashtool installation driver , if I remember correctly there will be driver folder..
Sent from my C6603 using XDA Premium 4 mobile app
Mansoor1223 said:
bro even it tried more than 20 times but problem remains the same,, it was same as my htc,, my htc had the same problem but once i tried and done,,, i have some experience in flashing and rooting but this xperia annoyes me alot.... please help me,,, show me the drivers,,,,
Click to expand...
Click to collapse
Try this drivers http://forum.xda-developers.com/showthread.php?p=41724482
But don't forget to use latest version of flashtool. And disable the anitivirus in pc if running, that had helped at least for me...!
Sent from my LT26i using xda app-developers app
recovery
pracas said:
Try this drivers http://forum.xda-developers.com/showthread.php?p=41724482
But don't forget to use latest version of flashtool. And disable the anitivirus in pc if running, that had helped at least for me...!
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
thanks alot,,,,, my bootloader is unlocked and now please tell me how to flash cwm recovery to xperia s and how to go into recovery mode\
restarting issue
pracas said:
Try this drivers http://forum.xda-developers.com/showthread.php?p=41724482
But don't forget to use latest version of flashtool. And disable the anitivirus in pc if running, that had helped at least for me...!
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
please help me my phone is now restarting time to time
Mansoor1223 said:
thanks alot,,,,, my bootloader is unlocked and now please tell me how to flash cwm recovery to xperia s and how to go into recovery mode\
Click to expand...
Click to collapse
Use this kernel http://forum.xda-developers.com/showthread.php?p=42005739
This is advanced stock kernel which has pre-loaded CWM recovery, when phone reboots you will get led to yellow then press volume + & you can use working recovery!
And then flash latest 6.2.B.1.96 FW..!
But if u want rooted 1.96, don't forget to follow this tutorial...!
http://forum.xda-developers.com/showthread.php?p=44918676
Sent from my LT26i using xda app-developers app

Fastboot Waiting for device

Earlier i have my root for the mobile usuing towel root .. Trying to flash kernels now and recovery .. But i cant .. I followed the steps .. Wrote " fastboot flash boot boot.img " and everything .. But it keeps writing waiting for device .. Is there a solution for that ?
Sent from my D5503 using XDA Free mobile app
Chelshady said:
Earlier i have my root for the mobile usuing towel root .. Trying to flash kernels now and recovery .. But i cant .. I followed the steps .. Wrote " fastboot flash boot boot.img " and everything .. But it keeps writing waiting for device .. Is there a solution for that ?
Sent from my D5503 using XDA Free mobile app
Click to expand...
Click to collapse
Try unplug the USB cable from Z1C, turn Z1C off, and while pressing the volume down button re-connect the USB cable to Z1C.
When it tried it .. The light became green for a second then goes off ans still waiting for device
Sent from my D5503 using XDA Free mobile app
When it tried it .. The light became green for a second then goes off and still waiting for device
Sent from my D5503 using XDA Free mobile app
Chelshady said:
The light became green for a second then goes off ans still waiting for device
Click to expand...
Click to collapse
Put it in fastboot mode, not flash mode.
I put it always in fastmode .. Volume up .. Blue led .. Same problem
Sent from my D5503 using XDA Free mobile app
Chelshady said:
I put it always in fastmode .. Volume up .. Blue led .. Same problem
Sent from my D5503 using XDA Free mobile app
Click to expand...
Click to collapse
Have you actually unlocked your bootloader?
XperienceD said:
Have you actually unlocked your bootloader?
Click to expand...
Click to collapse
Look mate i have my bootloader unlocked today .. I had my root when the bootloaser was locked ... Now some features of the root working and some not .. Superus and greenify working but xposed isnt .. Any help ? .. Got my root via easy towel root
Sent from my D5503 using XDA Free mobile app
Chelshady said:
Look mate i have my bootloader unlocked today .. I had my root when the bootloaser was locked ... Now some features of the root working and some not .. Superus and greenify working but xposed isnt .. Any help ? .. Got my root via easy towel root
Sent from my D5503 using XDA Free mobile app
Click to expand...
Click to collapse
Flash a ftf and start over, and confirm you've actually unlocked your BL. You clearly haven't read instructions properly either, so do that, rushing when you don't know what you're doing makes things worse.
XperienceD said:
Flash a ftf and start over, and confirm you've actually unlocked your BL. You clearly haven't read instructions properly either, so do that, rushing when you don't know what you're doing makes things worse.
Click to expand...
Click to collapse
I know its unlocked now because it wiped out all the data and i restored it as i had backup .. Any other way to make sure ?
Sent from my D5503 using XDA Free mobile app
To see your bootloader status, dial *#*#7378423#*#*, then go to Service Info, then Configuration
LaZiODROID said:
To see your bootloader status, dial *#*#7378423#*#*, then go to Service Info, then Configuration
Click to expand...
Click to collapse
It says: " bootloader unlocked: yes "
Sent from my D5503 using XDA Free mobile app
Great!
As for your fastboot problem: After you installed flashtool, did you go into it's folder, then to the "drivers" folder, and install the fastboot driver from there? (it shows you a list of drivers available for install - I believe fastboot is near the bottom?) Note that if you're going to do this on Windows 8, you will need to disable Driver Signature Enforcement
Chelshady said:
Any other way to make sure ?
Sent from my D5503 using XDA Free mobile app
Click to expand...
Click to collapse
Try flashing a kernel, make sure the Phone is connected to the computer and in fastboot mode before running any commands, reboot both if it still fails and/or try another USB port.
LaZiODROID said:
Great!
As for your fastboot problem: After you installed flashtool, did you go into it's folder, then to the "drivers" folder, and install the fastboot driver from there? (it shows you a list of drivers available for install - I believe fastboot is near the bottom?) Note that if you're going to do this on Windows 8, you will need to disable Driver Signature Enforcement
Click to expand...
Click to collapse
When i had this problem i didnt have my bootloader unlocked .. Do unlocking the bootloader affect the root ?
Sent from my D5503 using XDA Free mobile app
XperienceD said:
Try flashing a kernel, make sure the Phone is connected to the computer and in fastboot mode before running any commands, reboot both if it still fails and/or try another USB port.
Click to expand...
Click to collapse
When i had this problem i didnt have my bootloader unlocked .. Do unlocking the bootloader affect the root ?
Sent from my D5503 using XDA Free mobile app
Chelshady said:
When i had this problem i didnt have my bootloader unlocked .. Do unlocking the bootloader affect the root ?
Sent from my D5503 using XDA Free mobile app
Click to expand...
Click to collapse
Is that a yes or a no?
LaZiODROID said:
Is that a yes or a no?
Click to expand...
Click to collapse
now i flashed " Z1c_DooMLoRD_AdvStkKernel_FW-114_v01.img " .. tried to reboot but it runs in reboot loop .. what is the solution for that ?
I'm with @XperienceD on this - it's time to pause and do some more reading and research.
That custom kernel you just flashed - what firmware is it based on? It's a good idea to make sure that kernel is compatible with the base system firmware that is currently on your phone.
LaZiODROID said:
I'm with @XperienceD on this - it's time to pause and do some more reading and research.
That custom kernel you just flashed - what firmware is it based on? It's a good idea to make sure that kernel is compatible with the base system firmware that is currently on your phone.
Click to expand...
Click to collapse
i`m downloading the 4.4.4 ftf and will flash it using frametool .. is that right ?

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