I am having the same problem… The video callng is dark. I am version 18.104.22.168G. I brought this phone week ago and already replaced the unit (meizu m5) 3 times because i thought i got a damage unit until i realize its the meizue m5 itself has the problem with the firmware. I am a big fan of meizu but i was so dissapointed. Is there anything we can do?