[Q] Huawei U8520 don't reboot - Android Q&A, Help & Troubleshooting

Hi everyone,
I have one Huawei U8520, last monday the phone was rebooting and i went out of battery, after that happen the phone doesn't boot anymore.
I cant boot in fastboot mode, i cant do hardreset and when i connect the cell phone thru usb nothing happens.
When i press the power button, the only thing that happens it´s the menu button that flash one time every 30 seconds.
What should i do about this problem?
Thanks in advance.

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FASTBOOT, FLASHBOOT does not want exit

My xperia when i connect to the flash mode even if i disconnect phone from the usb it still keep geen led for another 15 sec then when i press power it still boot to flash mode
the same happen with the fast boot
I have to keep the volume+power for a 15 s then it boot normally is that a guaranty
phone is in the locked original boot loader simfree ->original condition
When i restart phone it start in the flashmode it does matter whether the usb is in or out
I flashed twice already but every time i couldnt exited and power up android i have to do the hard reset trick (battery) before it turn to the android
marcoplo said:
My xperia when i connect to the flash mode even if i disconnect phone from the usb it still keep geen led for another 15 sec then when i press power it still boot to flash mode
the same happen with the fast boot
I have to keep the volume+power for a 15 s then it boot normally is that a guaranty
phone is in the locked original boot loader simfree ->original condition
When i restart phone it start in the flashmode it does matter whether the usb is in or out
I flashed twice already but every time i couldnt exited and power up android i have to do the hard reset trick (battery) before it turn to the android
Click to expand...
Click to collapse
Could be something wrong with the volume keys! Try contacting the service centre.
yea that sound resonable

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Phone in question: Galaxy Ace 3 - GT-S7275R
A short summary of my issue and how it happend: Yesterday evening my phone was suddenly turned off before i went to bed and i turned it back on and it said it was doing an android software update, but my phone normally never gets an update. And when it was turned on it received pop up message with the message: ..... app has stopped. (facebook, Google Play, YouTube, ...) And i left it untill the morning and i rebooted it then but it was again the same so i tried another reboot and then it wouldn't start up.
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I tried to flash twrp and now my phone is stuck in a 5 second boot loop.
Fastboot and recovery can't be accessed at all no matter what combination I make. vol+ power, vol- power, both +- power, hold 40 secs 60secs (useless because phone reboots in 5 secs) , all tried. Every 5 seconds it just boot loops. Help me.. I have it for less than a week. Wanted to flash only because the stock rom was giving problems such as landscape and auto random reboots.
I even tried a script which said would wait in adb detect mode, that didn't work. Guess phone rebooted before my pc could detect it. Tried installing intelSOC method as suggested in another thread, the short reboot is tough to get by.
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Hi , let your battery to completely empty , press vol + and plug usb to see if phone goes into Fastboot mode if not try Vol - and plug usb .
Both didn't work. But thanks.
Teddy Lo said:
Hi , let your battery to completely empty , press vol + and plug usb to see if phone goes into Fastboot mode if not try Vol - and plug usb .
Click to expand...
Click to collapse

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I tried to enter download mode through recovery mode since I couldn't find the proper key combination for the M31 online. But now it's stuck in a black screen with nothing but the words 'entering fastboot' on top. I can't restart it.
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zequihumano said:
Press the power button for a long time (A minute at most)
Click to expand...
Click to collapse
yo it isnt working pls help me out
Just documenting my (M315FXXU2ATJ9) solution (found through trial and error) in case this happens to somebody.
This is what worked for me:
1. Connect your phone to your PC via USB
2. Hold down VOL_UP + VOL_DN + POWER for 10 seconds
Your M31 will turn off and the charging logo will appear.
You can now simply disconnect the USB cable and turn it on normally.
Hope this helps.
Hello,
I had updated my M315F to official OneUI4.1, but I am having battery issues and the phone is bit laggy, so I decided to revert to OneUI3.1 using Odin tool, however on entering the recovery mode and getting into "Reboot to bootloader", device stucks at "Entering fastboot....", and its unresponsive as download mode doesn't start. The first time I did without unlocking the OEM, but even after unlocking the OEM and entering the bootloader, it says "Entering fastboot...., so again restarting phone and repeating the same process. Download mode doesn't start.
Is there anyway to reboot to download mode?
Thanks in advance
Help is much appreciated
Regards

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