Flashed P40 Pro not working USB on EMUI 12

[HaryWithTwoRs]

I bought a second hand ELS-N29 that is on EMUI 12 and the previous owner told me they flashed it. I noticed that vibration is weak except the indicator that you've reached the maximum/minimum volume, in that case the vibration strength is normal, and USB connection isn't recognized on either PC or phone and SuperCharge isn't working. When I put my phone in fastboot mode, however, the PC recognizes it and when I enter system recovery on HiSuite while the phone is in fastboot, the phone recognizes that I've entered recovery mode. So I'm thinking it's a software issue and not a hardware issue. Is there anyone that can help me with this? eRecovery didn't help. I can't seem to find C185 full OTA anywhere on the internet to try dload (I have an NM card).

 

[badmania98]

If reset to factoy settings doesnt help you, it should be a hardware issue. Also be sure that you use an original USB cable + original 40W charger to have fast charging.
You also be sure that you have installed HiSuite on computer.

 

[korneenko.y]

I bought a second hand ELS-N29 that is on EMUI 12 and the previous owner told me they flashed it. I noticed that vibration is weak except the indicator that you've reached the maximum/minimum volume, in that case the vibration strength is normal, and USB connection isn't recognized on either PC or phone and SuperCharge isn't working. When I put my phone in fastboot mode, however, the PC recognizes it and when I enter system recovery on HiSuite while the phone is in fastboot, the phone recognizes that I've entered recovery mode. So I'm thinking it's a software issue and not a hardware issue. Is there anyone that can help me with this? eRecovery didn't help. I can't seem to find C185 full OTA anywhere on the internet to try dload (I have an NM card).

[CLOSED] [GUIDE] How to solve wrong downgrade+fix USB connection to computer (P40Pro+ firmware on P40 Pro / N39 on N29)

Did you downgrade P40Pro using P40 Pro+ firmware? Maybe this thread can help you. This is for C432 region only. Do not use this firmware on other region firmware. I can prepare the firmware for other region. When you downgrade P40Pro firmware...

forum.xda-developers.com

Check if this can help. Maybe previos owner accidently flashed wrong firnmare

 

[badmania98]

[CLOSED] [GUIDE] How to solve wrong downgrade+fix USB connection to computer (P40Pro+ firmware on P40 Pro / N39 on N29)

Did you downgrade P40Pro using P40 Pro+ firmware? Maybe this thread can help you. This is for C432 region only. Do not use this firmware on other region firmware. I can prepare the firmware for other region. When you downgrade P40Pro firmware...

forum.xda-developers.com

Check if this can help. Maybe previos owner accidently flashed wrong firnmare

No way. Dont use that/my tutorial.

 

[HaryWithTwoRs]

If reset to factoy settings doesnt help you, it should be a hardware issue. Also be sure that you use an original USB cable + original 40W charger to have fast charging.
You also be sure that you have installed HiSuite on computer.

When in fastboot mode, the PC recognizes that there's a device connected in recovery mode and the phone does the same so I don't think it's hardware. Failure for that recognition when the phone is powered up is why I think it's a software issue. So I want to flash a full ota or any other means people might suggest here because I can't seem to find firmware for my region.

 

[badmania98]

When in fastboot mode, the PC recognizes that there's a device connected in recovery mode and the phone does the same so I don't think it's hardware. Failure for that recognition when the phone is powered up is why I think it's a software issue. So I want to flash a full ota or any other means people might suggest here because I can't seem to find firmware for my region.

I dont think so, but.... who am I?

 

[korneenko.y]

No way. Dont use that/my tutorial.

greetings.
Btw could you help as i've flashed with 102.0.0.325, thinking its harmony OS as firmware database state.
But its just an ordinary EMUI 12 that i can't downgrade through HIsuite / proxy / dload.
Help appriciated.
During DLOAD i get verification error, HiSuite gives me package error.

 

[badmania98]

greetings.
Btw could you help as i've flashed with 102.0.0.325, thinking its harmony OS as firmware database state.
But its just an ordinary EMUI 12 that i can't downgrade through HIsuite / proxy / dload.
Help appriciated.
During DLOAD i get verification error, HiSuite gives me package error.

I don't know what phone do you have, what firmware is on it now or was before you upgraded. A screenshot of About phone is needed.

 

[Cyanide_zh]

The simultaneous loss of usb2.0 transfer and Huawei fast charging is a sign of triggering anti-rollback. Usually it is caused by downgrading from a version released after fixing the checkmate 30 vulnerability. Just wireless OTA upgrade to fix it， or you can purchase an harmony tp cable to restore USB 2.0 tranfer, or using a USB 3.0 cable connected to USB 3.0 port to transfer data.

 

[badmania98]

The simultaneous loss of usb2.0 transfer and Huawei fast charging is a sign of triggering anti-rollback. Usually it is caused by downgrading from a version released after fixing the checkmate 30 vulnerability. Just wireless OTA upgrade to fix it， or you can purchase an harmony tp cable to restore USB 2.0 tranfer, or using a USB 3.0 cable connected to USB 3.0 port to transfer data.

You are right if the firmware were under 11.0.0.190 but he said it is Emui12

 

[korneenko.y]

I don't know what phone do you have, what firmware is on it now or was before you upgraded. A screenshot of About phone is needed.

P40 Pro ELS-n29 C10 region.
Originally it was on R3 firmare.

 

[badmania98]

Post an image of firmware that you used for upgrade.

 

[korneenko.y]

Post an image of firmware that you used for upgrade.

 

[badmania98]

You are off topic here. Better find me on Telegram. I have the same nickname

 

[korneenko.y]

You are off topic here. Better find me on Telegram. I have the same nickname

I appreciate your help and managed to downgrade to EMIU 11 with HiSuite OVA 11 + China DNS. Without lan settings i had connection error. Thx a lot any way