Sony.yt - International Sony Forum

Hello, I need help with my m4, is completety dead,

 no rocvery mode or fast mode.
not vibrate, no led, does not vibrate.
the device manger recognizes it as "SOMC Flash Device"

someone known method to unbrick my phone ? 

I would appreciate   help 

How did you bricked your phone?

i was trying to "port" a rom    

Well i think you've flashed non official firmware to your phone. In this case if you damaged boot you can try to desolder emmc, flash boot from working phone using direct emmc tool, solder it again and flash your phone using proper Sony firmware. Or buy Xperia M4 with broken lcd and swap main board.