problem in rebooting device - Sony Xperia XZ2 Compact Questions & Answers

hi every one i have a problem with my phone xz2c ... when i want it reboot he shut down and wont wake up untill i put it in charge and the same thing when i shut it down wont power on even i try all key power key +down or +up wont power on like i said untill i put it in charge :crying: :crying:
BUT when i reboot it with fasboot command (fastboot reboot) he reboot
i do a full wipe and fresh flash with flashtool and newflasher nothing help :crying: :crying: :crying:
my device still on stock firmware and not unlocked bootloader so any help for that???? and thank you....sorry for my bad english

Hi, unfortunately I have the same problem and experience with my XZ2C with locked bootloader and latest PIE fw *. 163. I did not notice that before.
I also did not find anything, what could help. I wiped and reflashed phone, it was useless and waste of time.
I also noticed, that I'm not able to start the phone when connected to PC, it starts directly in flash mode (same as POWER + vol Down). And there is no graphics in this mode also... I think, I had to select something in the 'menu' with blue (?) background to be able to flash ROM previously...
Another 'great' update from Sony?
I hope they will fix it in next (bootloader) update.

rSG1t said:
Hi, unfortunately I have the same problem and experience with my XZ2C with locked bootloader and latest PIE fw *. 163. I did not notice that before.
I also did not find anything, what could help. I wiped and reflashed phone, it was useless and waste of time.
I also noticed, that I'm not able to start the phone when connected to PC, it starts directly in flash mode (same as POWER + vol Down). And there is no graphics in this mode also... I think, I had to select something in the 'menu' with blue (?) background to be able to flash ROM previously...
Another 'great' update from Sony?
I hope they will fix it in next (bootloader) update.
Click to expand...
Click to collapse
did you fix the problem mine still same prolem???
not able to power on untill connect charger
no reboot untill put charger
when connect it to the PC (when it power OFF) he entre to fastboot mode directly without push any button
any help in here please :crying::crying::crying:

Related

EMERGENCY Brick!

hi,
any help is hugely appreciated.
I wiped my phone in recovery with the option to wipe for new custom rom, this worked fine. when i went to install custom rom it failed and then turned itself off. now the phone just gets stuck at the Sony logo. the only way i can turn it off is via the red button in the sim slot.
I am unable to connect to the computer at all, no fastboot. I'm also unable to boot into recovery to restore.
Please help. Hope i haven't ****ed it up beyond fixing
Thanks
Flash a stock ftf with flashtool (in flashmode). You should definitely get into flashmode and fastboot, otherwise there is a problem with your computer.
Funny, I didn't even know there was a red button Holding Volume Up + Power for a few seconds always worked for me, no matter in which state the phone was.
Hi all,
I've exactely the same problem !!!
My phone stuck to Sony logo, and not reconyze on my 3 PC.... before that, usb connexion work fine on all PC, but now.... nothing
I've just POWER + and VOL+ (its power off the phone), i've no led color light
I've try flashboot, but not detect my phone
i've try to install :
flashtool-0.9.16.1-windows (not detected)
Flashtool-drivers-1.5-20140318 (my computer doesnt not see my phone)
Xperia_Z1_Compact_driver (my computer doesnt not see my phone too)
I can't go into Flashmode...
When i power off my Z1c, and i plug usb + (vol+) nothing appear...stuck Sony logo...
I'm lost... I need your help XDA members ! just U can help me
PS : the red button is in the SIM slot, but i think is same POWER + (VOL+).... its power off the phone
Because you're doing it wrong. Vol+ enters fastboot mode, you have to press Vol- to enter flashmode. Then use Flashtool to restore the firmware.
Iruwen said:
Because you're doing it wrong. Vol+ enters fastboot mode, you have to press Vol- to enter flashmode. Then use Flashtool to restore the firmware.
Click to expand...
Click to collapse
THX for your response !
Sorry it's a mistake....
I've try both (vol+ and USB) and (vol- and USB).... but no sound (device not detected), in device manager nothing appear too.
I've make a fresh install of windows 7 x64 on another PC.
I finaly working to boot (2-3 times) with Vol- + USB cable, but stay in sony logo and Flashtool whait for device...
Please i need u're help beacause i'm really lost (usualy i flash many phone S4, Mediatek, phones, etc...) but now i dont find solution
My problem come from the original cable
All this because of the USB cable does not work ... CRAZY !
This USB cable is new and original sony... just 2 Weeks
I solved my problem with new one
That's unfortunate, good you found the issue.

[Guide] Soft unbrick/reflash stock firmware

DISCLAMER and WARNING: I'm not responsible for bricked devices, dead SD cards, thermonuclear war, or the current economic crisis. Please do some research if you have any concerns about this app.
Click to expand...
Click to collapse
Story:
Just received Sony Smartwatch 3 and decided to oem unlock for future so once root available I would not need to reset device.
Enabled adb
manually specified correct drivers in device manager
rebooted to bootloader using adb reboot bootloader
entered fastboot oem unlock twice and watch rebooted
but got stuck on boot for whatever reason.
I tried all the methods to get into fastboot (Swiping diagonal as on LG watch, and together with power button as on samsung ) to no avail.
The only other mode I was able to get into - s1 flash device w/o drivers.
Found Sony Emma software to work with unlocked Xperia, and after its installation it said that bootloader is locked and I need to either update from sony site or unlock bootloader first!
Installed Sony PC Companion software, but software update while listing smartwatch 3 said that there is no firmware for it.
After googling random forums on bootlooping sony xperias found that to reset device you need to click "repair my phone/tablet" in Phone/Tablet Software Update section
Click to expand...
Click to collapse
Guide to unbrick bootlooping SWR50 that is able to get into s1 bootloader/flash mode:
1. Power off device by holding power key until it reboots and then switches off with few vibrations
2. Connect to computer and check device manager - you should see unknown device
3. Install Sony PC Companion from this website http://www.sonymobile.com/us/tools/pc-companion/
Check if driver appeared in the Device Manager, e.g. unknown device will disappear and something like SEFLash will appear under usb controllers
If driver is still not found - try to install Emma (http://developer.sonymobile.com/services/flash-tool/) and get this driver to work
4. Go into PC Companion and click on "Support Zone", it will be downloaded
5. Then click on "Accessories software update" and try to update Smartwatch 3 (We might get new versions in the future, so it will be easiest to do so)
UPDATE: Now you can reflash from Accessories page, it will ask if you want to refrlash. Keeping steps bellow for information purposes.
6. If #5 not working:
Click on "Phone/Tablet Software Update" (yes, silly), click on "repair my phone/tablet", click Continue and Agree to all licenses, etc....
7. Once presented by the list of phones - Select anything I guess, but I selected Xperia Z2, it should start downloading and then updating.
8. Once done it will say build number watch was flashed, in my case it was KNX01V
9. Disconnect watch and boot it.
P.S. I guess they show phone selection just to provide instructions how to get into download mode and then flash based on the versions from bootloader.
P.P.S I'm glad I tried this last resort thing after being ready to deal with verizon support and waiting for new watch...
I've found that formatting cache and userdata partition like it says in the link below makes the device boot as expected:
source.android.com -> /source/building-devices.html#unlocking-the-bootloader
(sorry for faulty link, new user)
Good to know, I decided to wait a bit as I was eager to play with new toy.
Will unlock tomorrow if it is still locked after Sony reset.
And looks like I would have to write my own apps to test GPS and sensors performance.
And the good news is fastboot state unlocked after stock reflash.
XorZone said:
manually specified correct drivers in device manager
Click to expand...
Click to collapse
Can you please elaborate on which driver you used to get access to the Smartwatch 3 via ADB? I am trying to use the latest google USB driver, but the device is showing up as offline listed under "adb devices". Just tried the latest ADB v1.0.32 and it seems the watch shows up as "unauthorized". Did you see an ADB notification on the watch that you had to accept, because I am not seeing anything like that.
NVM, it started working after I restarted adb server like 25 times...
Device offline usually is not about driver. But I hit on device and manually picked google-adb composite device
OK, bricked watch today with corrupted /system and boot process hanged with non responsive power button. Had to wait for discharge and it was pita to get into flashmode with enough juice, because after black screen charging it boots instead of going into kernel charging.
Anyway it is up and running and has ROOT now!
Will upload files and create guide as soon as I will be with good internet.
See my sig!
*delete*
*deleted*
Well, there are different levels of bootloaders
At least Sony s1 flash, fastboot, kernel...
To flash with PC companion you need to boot into s1 by powering off and then hold power and connect to USB once sony logo shown (you should see black screen with backlight on). Make sure you sit on PC companion update screen and that watch had enough juice.
With charging there are different levels of charging:
1. Battery dead
2. Boot loader charging (about 4 min from USB port) with black screen
3. Kernel charging either offline (if you powered off before) or boot and operational charging.
When #2 charges it will boot kernel and if kernel or system is broken it might hang and discharge.
But you can force into s1 flash mode before it boots into kernel. Or if you lucky you could power on and power off before it boots and hang.
In my case I had not enough juice to flash it and watch didn't react to button in kernel mode, so I had to wait for discharge, then plugged into USB and start timer, figured it boots after ~3min 55sec. So I opened PC companion update screen, waited 3:53 and disconnected watch, then hold power button and connect to PC after 5 sec and was able to flash.
To power off - just hold power button until it reboots and continue holding until it vibrates 3 times.
Good luck
XorZone said:
Story:
Guide to unbrick bootlooping SWR50 that is able to get into s1 bootloader/flash mode:
1. Power off device by holding power key until it reboots and then switches off with few vibrations
2. Connect to computer and check device manager - you should see unknown device
3. Install Sony PC Companion from this website http://www.sonymobile.com/us/tools/pc-companion/
Check if driver appeared in the Device Manager, e.g. unknown device will disappear and something like SEFLash will appear under usb controllers
If driver is still not found - try to install Emma (http://developer.sonymobile.com/services/flash-tool/) and get this driver to work
4. Go into PC Companion and click on "Support Zone", it will be downloaded
5. Then click on "Accessories software update" and try to update Smartwatch 3 (We might get new versions in the future, so it will be easiest to do so)
UPDATE: Now you can reflash from Accessories page, it will ask if you want to refrlash. Keeping steps bellow for information purposes.
6. If #5 not working:
Click on "Phone/Tablet Software Update" (yes, silly), click on "repair my phone/tablet", click Continue and Agree to all licenses, etc....
7. Once presented by the list of phones - Select anything I guess, but I selected Xperia Z2, it should start downloading and then updating.
8. Once done it will say build number watch was flashed, in my case it was KNX01V
9. Disconnect watch and boot it.
P.S. I guess they show phone selection just to provide instructions how to get into download mode and then flash based on the versions from bootloader.
P.P.S I'm glad I tried this last resort thing after being ready to deal with verizon support and waiting for new watch...
Click to expand...
Click to collapse
This method is windows only. Is there no cross-platform way to do it?
I did the stupid thing.. and ended up with a softbricked phone.
Sony PC Companion did the trick for me!
I tried doing it through VMWare on my macbook, but didn't seem to work at all.
On windows it was plug'n'Pray
Sony companion will not let me restore my SW50. Detects it and tells me that the software is updated. If I try from the menu to repair phone, it makes me accept all agreements and finally tells me the same thing no updates.
Is in bootloop and do not start after open bootloader
My sw3 is in bootloop.I uesd your guide but still can't repair my watch. I tried many time to use pc companion but always got the same wrong message,wrong code(100) which couldn't connect to the Internet.
@swidon @KONG8691
I find myself in the same situation, you have found a solution to the problem?
Thanks for your help
best regards
jerry_italia said:
@swidon @KONG8691
I find myself in the same situation, you have found a solution to the problem?
Thanks for your help
best regards
Click to expand...
Click to collapse
Yes!, follow these instructions and you can enter in fastboot or recovery and flash a new firmware:
Detach any USB cable connected to the watch
Turn it off holding the power button and keep holding the button until the watch vibrates three times and then switches it off
Press the power button and keep holding. A blue screen that prompts to insert an USB cable will display
Double tap the power button
A black menu will display, with on-screen instructions
Move to Fastboot or Recovery Mode pressing the power button, once a time
Select Fastboot (or Recovery) by double pressing the power button
Good luck bro.
swidon said:
Yes!, follow these instructions and you can enter in fastboot or recovery and flash a new firmware:
Detach any USB cable connected to the watch
Turn it off holding the power button and keep holding the button until the watch vibrates three times and then switches it off
Press the power button and keep holding. A blue screen that prompts to insert an USB cable will display
Double tap the power button
A black menu will display, with on-screen instructions
Move to Fastboot or Recovery Mode pressing the power button, once a time
Select Fastboot (or Recovery) by double pressing the power button
Good luck bro.
Click to expand...
Click to collapse
you are my hero... stock recovery flashed and sw3 reboot! thankyou so much bro
jerry_italia said:
you are my hero... stock recovery flashed and sw3 reboot! thankyou so much bro
Click to expand...
Click to collapse
How do you go about getting stock recovery back at the moment I'm on 5.0.1 and I can't ota update to 5.1.1 because it thinks its on 5.1.1 when it's not the only way I can think of updating it is to get stock recovery then sideload the ota zip on stock recovert but I can't do that with TWRP can someone help?
Hi,
My watch boot loops on the marshmelow boot animation after I Got marshmelow
I tried XorZone instractions and it said it re-updated image. but it will boot looped.
I tried to factory reset from the menu (double tap at download screen then go factory reset).... didn't work. still boot loops.
I see I can go to fastboot or recovery, but what do I do there? Any instructions I can follow to try to revive my watch please? thanks.
wonderfull!
XorZone said:
Well, there are different levels of bootloaders
At least Sony s1 flash, fastboot, kernel...
To flash with PC companion you need to boot into s1 by powering off and then hold power and connect to USB once sony logo shown (you should see black screen with backlight on). Make sure you sit on PC companion update screen and that watch had enough juice.
With charging there are different levels of charging:
1. Battery dead
2. Boot loader charging (about 4 min from USB port) with black screen
3. Kernel charging either offline (if you powered off before) or boot and operational charging.
When #2 charges it will boot kernel and if kernel or system is broken it might hang and discharge.
But you can force into s1 flash mode before it boots into kernel. Or if you lucky you could power on and power off before it boots and hang.
In my case I had not enough juice to flash it and watch didn't react to button in kernel mode, so I had to wait for discharge, then plugged into USB and start timer, figured it boots after ~3min 55sec. So I opened PC companion update screen, waited 3:53 and disconnected watch, then hold power button and connect to PC after 5 sec and was able to flash.
To power off - just hold power button until it reboots and continue holding until it vibrates 3 times.
Good luck
Click to expand...
Click to collapse

acro s hard bricked

i got my acro s hard bricked
I used twrp for making a backup for the the stock firmware.
and then i installed the 5.0.1 the lollipop custom firmware
the link :http://forum.xda-developers.com/showthread.php?t=2799765
, but it was not rooted but somehow the recovery was working good .. i decided to restore the stock using the backup version which i made in the beginning coz the ROM was sucks. after finishing the loading it asked for restart and after that i got a blank screen and the following
-no response for charging
-no LED lights at all
-non of any combinations working (volume+ and power on , hard reset or volume+up+power on)
-access to fastboot or flashtool is denied
-no power on no vibrations
but after a day of charging an Orange LED appears but i waited for two more days till the LED disappeared
and tried the flashtool but all i got is "device connected but with debugging off"
i think the problem was using recovery with unrooted device but can't find a solution for that
any suggestions ??!!
Notes:
am too calm
am not panic ..
am not in hurry too
and it's not a big deal
i just want the device back in order to get my stuff from it that's why going to Sony service center is not an option coz they format the whole device
Similar here on st26i
On 4.4 Paranoidandroid I've got after a five days of use in one second a lot of force closes. From every app from the system. It was impossible to stop it, or make normal reboot, so I've hold Power + VolUp and waited till three vibrations. Then turn on the phone, normal vibration and SONY logo.
After that black screen. First with some backlight, after minutes phone backlight turn off.
Now:
- No response for Power button
- No response for Power+VolUp combination
- No charging LED
- System find only SEMC Flash Device
- Flashtool says Device Connected with USB Debugging off
- Combination Power+VolUp make connected device to disconnect and connect again as SEMC Flash Device
- Cant acces fastboot, dwonload mode.
smogf said:
Similar here on st26i
On 4.4 Paranoidandroid I've got after a five days of use in one second a lot of force closes. From every app from the system. It was impossible to stop it, or make normal reboot, so I've hold Power + VolUp and waited till three vibrations. Then turn on the phone, normal vibration and SONY logo.
After that black screen. First with some backlight, after minutes phone backlight turn off.
Now:
- No response for Power button
- No response for Power+VolUp combination
- No charging LED
- System find only SEMC Flash Device
- Flashtool says Device Connected with USB Debugging off
- Combination Power+VolUp make connected device to disconnect and connect again as SEMC Flash Device
- Cant acces fastboot, dwonload mode.
Click to expand...
Click to collapse
it seems like we stuck here
Yup.
Is there any windows/linux software for SONY devices like KDZ for LG phones? Which have an emergency flash option and, etc.???
/EDIT
So... I have read a little and I think (wchich I supposed before witout reading) boot is "dead".
I think it will be possibly to flash new boot with s1boot, but. I cannot find service manual for lt26i. Can anyone have it? Or can say where is the Test Point in this device?
makaom said:
i got my acro s hard bricked
I used twrp for making a backup for the the stock firmware.
and then i installed the 5.0.1 the lollipop custom firmware
the link :http://forum.xda-developers.com/showthread.php?t=2799765
, but it was not rooted but somehow the recovery was working good .. i decided to restore the stock using the backup version which i made in the beginning coz the ROM was sucks. after finishing the loading it asked for restart and after that i got a blank screen and the following
-no response for charging
-no LED lights at all
-non of any combinations working (volume+ and power on , hard reset or volume+up+power on)
-access to fastboot or flashtool is denied
-no power on no vibrations
but after a day of charging an Orange LED appears but i waited for two more days till the LED disappeared
and tried the flashtool but all i got is "device connected but with debugging off"
i think the problem was using recovery with unrooted device but can't find a solution for that
any suggestions ??!!
Notes:
am too calm
am not panic ..
am not in hurry too
and it's not a big deal
i just want the device back in order to get my stuff from it that's why going to Sony service center is not an option coz they format the whole device
Click to expand...
Click to collapse
Same situation, really need help from someone because its my only android phone right now.

Cant enter fastboot & recovery mode!

Hello,everyone,i got a problem that i cant enter fastboot and recovery mode.
today ,i installed CM12 22/7 upgrade ,and before i install this ,i did a backup of build.prop because i have V4A and every time i upgrade CM i have to change this build,prop ,so i want make a copy and when i finish upgrade i can just move that file without do anything ,and everything goes well, i installed upgrade and installed V4A driver ,it says i need restart,so i restarted,but after LG logo ,screen turn black, cant enter system ! i thought maybe i flash CM one more time can repair this,so i press POWER and volume down,but,nothing happen ,after LG logo,and screen turn black,and i try to enter fastboot mode ,its the same ,when LG logo shows screen turn black.......
My phone is LG d855,and my English is bad,i hope you can understand
Can anybody help me?
did you try entering Download mode?
Phone stuck in bootloop, help please
wrong trhead
Are you sure you there is no fastboot and no download mode?
You can enter download mode by pressing and holding the “Volume Up” and connecting the USB cable from phone to PC
If it works then you Soft bricked it...And you can use this guide to fix it:
http://forum.xda-developers.com/showthread.php?t=2785089
.
.
.
BUT if that does not work then you Hard bricked the phone
I had that problem because of flashing with faulty win8 drivers...no download mode or fastboot, all i got was security warning and bootloop. The only way you can fix hardbrick is through JTag, but i don't know if you can fix it without paying someone money, because you need special hardware to do it. You can find people on ebay that can fix it but it will cost you 30-50$.
I sent mine to warranty...they didn't know what was wrong with it and couldn't fix it...and so they just replaced the motherboard. If you have a warranty then send it and do NOT!! tell them you flashed it or rooted it. Tell them you don't know what happened...The chances of them finding out is very small.
If ebay and/or warranty not work, then there was an article on the Internet to fix a hard brick but for some reason it is now password protected...i do not know why....You can send the owner an email so he can give you the password.
http://www.androidbrick.com/unbrick-recover-your-dead-lg-g3-g2-all-variants
...There is another article but it is in Portuguese
http://arena4g.com/forums/topic/tutorialunbrickhard-unbrickd855
But then again you cant be certain this will work either.
Conclusion: Fk LG...They don't want people upgrading their slow buggy software.
Alex_XV6700 said:
did you try entering Download mode?
Click to expand...
Click to collapse
i cant enter download mode,always turn black after LG logo
Disconnect cable from pc and phone
Press power + vol -
You will get first black screen, keep pressing until lg logo appears and it shuts off completely.
Then press just vol + and reconnect cable to computer.
That should leave you in download mode or fastboot.
Alex_XV6700 said:
Disconnect cable from pc and phone
Press power + vol -
You will get first black screen, keep pressing until lg logo appears and it shuts off completely.
Then press just vol + and reconnect cable to computer.
That should leave you in download mode or fastboot.
Click to expand...
Click to collapse
no,when i reconnect phone,and only press volume + ,its shows i am Charging then phone is off.......cant enter download mode,but i found when i press volume +and- , i can enter hardware key control mode,but there only have 3 choice,cancel , mode on and mode off,i have tried mode on and mode off,doesnt work.
rubisco1 said:
Are you sure you there is no fastboot and no download mode?
You can enter download mode by pressing and holding the “Volume Up” and connecting the USB cable from phone to PC
If it works then you Soft bricked it...And you can use this guide to fix it:
http://forum.xda-developers.com/showthread.php?t=2785089
.
.
.
BUT if that does not work then you Hard bricked the phone
I had that problem because of flashing with faulty win8 drivers...no download mode or fastboot, all i got was security warning and bootloop. The only way you can fix hardbrick is through JTag, but i don't know if you can fix it without paying someone money, because you need special hardware to do it. You can find people on ebay that can fix it but it will cost you 30-50$.
I sent mine to warranty...they didn't know what was wrong with it and couldn't fix it...and so they just replaced the motherboard. If you have a warranty then send it and do NOT!! tell them you flashed it or rooted it. Tell them you don't know what happened...The chances of them finding out is very small.
If ebay and/or warranty not work, then there was an article on the Internet to fix a hard brick but for some reason it is now password protected...i do not know why....You can send the owner an email so he can give you the password.
http://www.androidbrick.com/unbrick-recover-your-dead-lg-g3-g2-all-variants
...There is another article but it is in Portuguese
http://arena4g.com/forums/topic/tutorialunbrickhard-unbrickd855
But then again you cant be certain this will work either.
Conclusion: Fk LG...They don't want people upgrading their slow buggy software.
Click to expand...
Click to collapse
thx for your reply. i tried many times with different way,try to enter download mode or fastboot .......but failed.and now i decided buy Nexus 6

Question S21 FE - endless bootloop and download mode/recovery not working (properly)

Hello,
my wife got a S21 FE (SM-G990B/DS VD2). Yesterday it started to reboot over and over out of a sudden, showing the samsung logo first, followed by the knox logo, then shutting off and on again. Tried several guides to enter Recovery or Download Mode. The only thing that worked was entering download mode by pressing Vol up, down and power while a USB-Cable is plugged in, but as soon as i press the vol up button to pass the "warning screen", it shows some phone specs for a couple of seconds, shuts off and starts bootlooping again. After some hours, the phone once entered recovery mode when it lied next to me for about an hour. Tried to wipe cache, but just got an error I can't remember right now. Hoped it fixed itself when it made it to recovery and just rebooted to see if it works again, but then it just keept bootlooping again.
Since then I couldn't figure out why it once booted to recovery on it's own nor why I can't force it to enter recovery by pressing vol up + on.
Still hope it's just a faulty update or bug, but feels very much like it's a hardware related issue. Replacing the phone won't be an issue, but I'd really want to save data on the phone as my wife didn't make any backups and really wants to keep the photos.
As I just found guides that included recovery or DL-Mode, which are both no valid options for my case, I'd be thankful for any ideas to fix the phone or at least gain access to files before replacing it.
So.. did anyone come across similar issues and found a solution to revive the phone or are there any "unpopular" ways to recover samsung phones out of this state?
Edit:
Turned off completely overnight, booted once to system, looped again and now it's working like nothing ever happened. Got no clue what caused it or why it is working again. Saved everything for the case it happens again.
Wouldn't trust that device anymore, but my wife wants to keep it.
¯\_(ツ)_/¯
I would just like to reply here and add my own potential fix and also would like confirmation that it would work.
So I have a SM-G996B in a boot loop which returns a 'fs_mgr_mount_all' error. Possible to reboot into recovery mode, cleared cache and restarted bootloader etc with the same boot loop. Powered off and connected to PC for Download mode for ODIN recovery but upon pressing volume up, it then restarts again so Download mode recovery is impossible.
I know however that Developer options and USB debugging was enabled on the device as well as unlocked boot loader. I was able to download the correct original stock OS based on the PDA , CSC and Android version.
I have then installed the latest ADB software on my PC and Samsung USB drivers.
By then rebooting into recovery mode, I have the option of 'Apply update from ADB'. I have then confirmed the device connects using the ADB devices command.
I would like to clarify one thing however. I want to keep the user data at all costs. By using the stock firmware and renaming as update.zip, will it use the HOME_CSC and not the CSC file? If not would it work if I open the zip and remove the CSC before re-zipping to make sure?
Thanks
Reebee said:
Hello,
my wife got a S21 FE (SM-G990B/DS VD2). Yesterday it started to reboot over and over out of a sudden, showing the samsung logo first, followed by the knox logo, then shutting off and on again. Tried several guides to enter Recovery or Download Mode. The only thing that worked was entering download mode by pressing Vol up, down and power while a USB-Cable is plugged in, but as soon as i press the vol up button to pass the "warning screen", it shows some phone specs for a couple of seconds, shuts off and starts bootlooping again. After some hours, the phone once entered recovery mode when it lied next to me for about an hour. Tried to wipe cache, but just got an error I can't remember right now. Hoped it fixed itself when it made it to recovery and just rebooted to see if it works again, but then it just keept bootlooping again.
Since then I couldn't figure out why it once booted to recovery on it's own nor why I can't force it to enter recovery by pressing vol up + on.
Still hope it's just a faulty update or bug, but feels very much like it's a hardware related issue. Replacing the phone won't be an issue, but I'd really want to save data on the phone as my wife didn't make any backups and really wants to keep the photos.
As I just found guides that included recovery or DL-Mode, which are both no valid options for my case, I'd be thankful for any ideas to fix the phone or at least gain access to files before replacing it.
So.. did anyone come across similar issues and found a solution to revive the phone or are there any "unpopular" ways to recover samsung phones out of this state?
Edit:
Turned off completely overnight, booted once to system, looped again and now it's working like nothing ever happened. Got no clue what caused it or why it is working again. Saved everything for the case it happens again.
Wouldn't trust that device anymore, but my wife wants to keep it.
¯\_(ツ)_/¯
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Similar issue with same phone. In a bootloop after trying to root. None of the button combinations have worked for me, for the past several days.
Tried powering the phone off for the whole night.
When connected to the PC shows phone is in recovery mode via adb (blank screen though).
Want to know how to get into DL-mode, guaranteed.
Got to DL mode by pressing vol up + down + power + usb cable connected in PC and phone. However, couldn't do anything there, but maybe you can
Also, phone is still working and I still have no clue what was the problem and what fixed it.

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