Good day. I have a problem with the BV9900Pro. I bought the phone at the beginning of January 2021, so it is less than a month old. The phone is nice but I'm angry because it isn't working as it should. That's why I bought a new phone for a lot of money to keep it working well.
I have the system version BV9900Pro_EEA_S900AA_V1.0_20201105V07
I already reset my phone to factory settings and same problem.
Sometimes it works very well and then stupid for no reason. Touch does not work and starts applications by itself. This is not cool. Then you have to turn off the screen with the lock button and turn it back on for it to work. Please help because I don't want a new phone that breaks.
I am sending links to videos with recorded problem
https://drive.google.com/file/d/1A0RLSH ... sp=sharing

https://drive.google.com/file/d/1-tKTww ... sp=sharing

BV9900Pro_EEA_S900AA_V1.0_20200601V09

Hello,
Your phone, according to the videos, seems to be in good physical condition.
This may be due to a problem with the installed operating system.
I invite you to try to fully reflash your smartphone. The software version I have available below is 5 months ahead of your version. This will surely be able to fix your failure (tactile sensitivity).
Two files are present one at the eu version
And the second Non-Eu. The personal version of my smartphone is non-Eu.
I invite you to flash the whole, knowing that you will lose your data in the meantime. Make sure to make a backup of what you have important. Do not flash your smartphone with a sim card inside.
1) Go to debugging, 2) option for developers 3) Check OEM Unlocking
4) Your smartphone will be reset and unlocked to flash another version on it.

1) On your computer, download the adb and fastboot tool software, install the

2) on your smartphone activate option for developers and connect it to your pc.

3) on your pc, open the installed software.
Type adb devices
4) on your smartphone, tick authorize

5) you must obtain an identifiable device on your pc via the software. This means that your smartphone is manageable for your pc and thus
Valid for the rest of the procedure.

Unplug and turn off your smartphone.

Press, once turned off, on the lower volume and power at the same time. A menu with recovery, faatboot, reboot should reappear. If not, try again with the combination upper volume + power. Me everything always at the same time.
If ok, navigate with the volume buttons and select fastboot. Connect it to the pc, then
Type: fastboot devices.

A sign of identification of your device should be confirmed.

Then unlock your bootloader by typing : fastboot oem unlock

Your smartphone should ask you yes or no. So select. Once ok, restart your smartphone, then go back to the fastboot menu on your smartphone.
Reconnect it, check the connection....

And get these archives:
https://mega.nz/folder/OgkS3LKS#dfYnPrNfzRDh-xcTWGXhyA

https://mega.nz/folder/
OgkS3LKS#
dfYnPrNfzRDh-x
cTWGXhyA

You will find a scatter file
This one informs you of the partitions to be flached and their names here is an example:

Patch:C:\Users\Jack\Download\Non-Eu\

Scatter file:
partition_index: SYS40
partition_name: system
File_name: system. img
download: true
type: EXT4_IMG

Donnera: fastboot flash {partition_name} {Path:File_name}
So:
fastboot flash system "C:\Users\Jack\Download\Non-Eu\system.img"

Flash files with ext4_img or normal_ROM and is_download: true

I strongly warn you that this is a risky operation indeed you change version manually.
Personally, if your phone doesn't boot anymore, or has a bootloop,
I invite you to find the sp flash tools
This one will make it easier for you and will work as it should because it will read the scatter.txt file directly. On the other hand, for it to be functional, you have to: find the right driver for your smartphone's cpu and click on restart your windows PC with the shift key pressed. And then select start with unsigned drivers.
Once ok, your mission is to open the windows device manager,
Turn off the smartphone, plug it in by pressing only the volume up or down and see an unknown usb driver. Install it and make sp flash tool recognize it.
This is a very simple process, used to repair smartphones in case of serious system failure. (When the system is not even able to turn on or display a charge indicator.) I invite you to find out how to do this. Good luck, good travel.

Przepłukać tzn umyć? Bo nie wiem czy mi dobrze przetłumaczyło

I don't understand the word "reflesh"

how to do these flashing on my phone? My phone is new and won't I void my warranty by flashing?

I have two more cases. When making calls and holding the phone to my ear, my screen is not blocked and I turn on various applications with my face. Can you somehow set up a screen lock when talking on the phone? The second thing ... when recording movies, the camera loses focus. Is it normal for this phone model? Takes nice pictures

why are my messages not posted?

I'm surprised that got thru.
99 percent of message blocked by bv.

Same here. My first post (six month ago) which described my problem with a usb-c audio adapter was never published... 

FillLog wrote:

I'm surprised that got thru.
99 percent of message blocked by bv.

I'm not the only one then who's things don't get posted.