P9 Lite Big problem

[Pascal60]

Hello,
I encounter a big problem that my P9 Lite, after wanting to install EMUI 5 and return to EMUI 4 my phone is now blocked at the start of Android.
I can not access the system and my SD card reader is HS.
So I can not even install a new ROM
The only thing I can do is access fastboot but I have FRP Lock & PHONE Unlock.
How can I pick up my phone with your software ?
thanks a lot for your help

[Valdemaras]

Can attempt repair with dc-phoenix https://www.dc-unlocker.com/DC-Phoen...epair-tutorial

[Pascal60]

Many thanks !!
I got my phone
thank you for everything

[Pascal60]

By cons I install the full firmware VNS-L31C432B210, it works very well but my phone recognizes it as VNS-L31C900B210 ??
Can it be a problem?
How to make my phone recognize the correct number?
Thank you for your comeback.

[Valdemaras]

C900 means international/general version, shouldn't cause any harm for mobile. It (maybe) can be fixed by repairing model/country/vendor on hcu.