There is no custom firmware for your hardware yet...
Maybe some of the existing custom firmwares to work well with this hardware except maybe of wifi or BT ...
Who knows!
If you want to take the risk try them ... otherwise wait maybe for someone to do something about that!
Honestly, I could have tried flashing other custom ROMs that are available, but I cannot do so because there is no official firmware available to revert back to if something goes wrong
There is official firmware and it's here ! : Official Firmware
It's the ''0002_P0_newbt'' but i assume there must be an OTA update to ''0003_P0_newbt''
It has 2 files for flashing if you use the usb method (which i believe is the most proper way) !
If you manage to do your job give us a feedback
So be careful with the tests ... and good luck!