Question Download Mode Not Work, after flash up_param - Samsung Galaxy S21+

Hi, i bricked my S21 after flash false up_param. My Phone Not Turn in, only Vibrate i cant Go in the Download Mode.

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galaxy s 6 stuck in safe mode

hi everybody,
i have a galaxy s6 who is acting wired
it stuck in safe mode event if i try to turn in off, after reboot it still on safe mode
the wired things is my volume down button work fine in maintenance mode but dont work if the boot up
i can go to download mode and recovery but in recovery the volume Down stop working.
any helps??
thanks u all.

[Help]Phone Problem in Bootloop logo

Hi
i installed telegram app on my phone but after that my phone starting to hang
after a while my phone turned off
and i tried to turn on it
but my phone stuck in bootloop logo and after 5 second turn off and automatic turn on and stuck in bootloop logo and turn off and again again again
i cant charge my phone
i cant access to recovery - download - fastboot mode
i cant access to my phone by pc and usb
i cant wipe and factory reset by recovery mode and pc methodes
because my phone automatic turn on and hang and turn off (auto restart)
what i do?
plz help me bros
alit2 said:
Hi
i installed telegram app on my phone but after that my phone starting to hang
after a while my phone turned off
and i tried to turn on it
but my phone stuck in bootloop logo and after 5 second turn off and automatic turn on and stuck in bootloop logo and turn off and again again again
i cant charge my phone
i cant access to recovery - download - fastboot mode
i cant access to my phone by pc and usb
i cant wipe and factory reset by recovery mode and pc methodes
because my phone automatic turn on and hang and turn off (auto restart)
what i do?
plz help me bros
Click to expand...
Click to collapse
I take it you have a samsung? Instead of trying to force restart it (power and volume down) skip that and go strait to the botton combo for download mode. (Power, volume down, and home for me)

Is my phone completely bricked?

So, this morning I awoke to find my phone in a bootloop.
No idea what caused it.
Here's a basic rundown of the problem:
1. Stuck on Huawei logo
2. Cannot shut down without it instantly trying to reboot again
3. Cannot enter recovery mode
4. Cannot boot into safe mode
5. Not rooted
6. ROM never flashed
7. Fastboot probably never configured
8. Not recognized by laptop over USB
So . . . is there anything I can do to this phone if I have neither a USB connection nor the ability to enter recovery mode?
edit: Finally managed to get phone to turn off after another failed attempt at trying to enter recovery mode. This time, the phone did not turn on again. I think my phone is finally bricked, after hours of sitting there refusing to turn off.

I Do Not Have Access To Download Mode Galaxy a30s

Hello everyone! the problem is on the galaxy a30s
1.- I can enable the developer options, when I try to enable it gives me a message that the developer options were enabled but the section does not appear!
2.- at the time of wanting to enter in the download mode with the keys while, cell phone off, volume + - and connect usb type c to the computer only charging appears on the screen.
3.-In another attempt to enter in the download mode, i use the recovery options and select the download mode, the phone restarts in the system and not in download mode.
4.- already tried to restore to factory mode from the recobery but it tells me that mdm does not allow it and the phone is restarted in the system, I have my account registered in the phone, does not allow me to factory reset or encrypt the phone, when I select it encrypt appears enabled but then it is automatically disabled
Any suggestion will be welcome, already try disconnecting the battery vol + - and connecting the cable, but do not enter the download mode either, any option to use jig mode?
thanks for your time and regards.
To boot into Download Mode boot into Recovery Mode. And select Bootloader

Question Rooted phone enable bootloader can't exit security error

Hi guys,
I rooted my phone successfully, then I wanted to unroot and before flashing factory from I enable bootloader and now the phone screen is
Security error: This phone has been flashed with unauthorized software & is locked. Call your mobile operator...
And at the top of the screen, there is
Only official released binaries are allowed to be flashed : vbmeta
I try to enter in download mode volume + volume - USB cable and nothing.
I can't exit this screen to flash factory rom.
Any idea how to exit the screen?
I appreciate your help.
Thanks
Make sure yu force reboot your phone then swith to download mode fast to enable download mode
Fixed, needed to move the USB cable to the PC from USB 3.0 to USB 2.0 and it worked, I was able to switch to download mode.

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