Hello,
I have problem with very poor wifi with Cube i6 3g. It works only in same room where is router. In other rooms it shows signal strength 3 stripes and wifi in one corner work in other not. I think it can be wifi antenna issue. I have seen on youtube that TechTablets have disassembled this device. Maybe someone have tried to replace antenna and knows model of it?
For example Teclast Air III works perfect in all rooms.