Redmi 4x - Installed The Wrong Firmware

[miui1200z]

I have inadvertently over TWRP installed the Firmware for the redmi note 4x rather than correctly the firmware for redmi 4x. Now the mobile phone does not react at all, completely dead. Display black. The device can no longer be started in Fastboot mode. What can I do here, except to step into the dustbin? Does someone know advice? Thank you in advance.

 

[ingbrzy]

install HM4X fastboot via EDL mode..

 

[miui1200z]

Thank's,
I hope I am be able to force the device in the edl mode....because I can't start the fastboot mode with press power and volume down
I will try in the evening.

 

[miui1200z]

I hope this manual works with Redmi 4x:
Turn off the mobile and take a USB cable. Now connect one end of the cable to the PC port and leave the other end unconnected to the device. Now you need to press and hold Volume Up + Volume Down keys and then connect the other end of the USB cable with device. That’s the device will automatically boots into EDL mode.

 

[miui1200z]

The try was sadly not successful!
INGBRZY can you please exlpain short, what I have to do without the possibility to enable fastboot direct on the device?
Thank's in advance

 

[ingbrzy]

look for testpoints...

 

[miui1200z]

Trank you for the advice with the testpoints.
I find a way to force the device in the edl mode and after this I was able to flash a fast boot rom.
So It brings bag my phone after flashing a wrong Firmware!!
But the Main problem with 4x is, that It works without wifi only in 2g net, without changing anything one the Phone.
It starts with roaming in Austria, and now back in Germany the Same, no 3G or 4g net Connection.
A lot of People have the same Problem with this device, but no Solution to this.