With regards to using PED (Personal Electronic Devices) aboard aircraft, every regulatory agency is going to have thier own guidance and regulations. Since the OP is in Europe (I'm assuming), then he should research thier guidelines.
I'm only somewhat up to date on FAA guidelines and regulations. Generally speaking, it is up to the operator (Airline or Pilot In Command) to allow/disallow PEDs. WiFi enabled devices are allowed because the WiFi system has been extensively tested and approved for aircraft use. This is why you can use your phones and tablets in WiFi only mode.
Now, is the OP's device going to cause interference? Maybe, maybe not. Since it hasn't been extensively tested by (or on behalf of) a regulatory agency, then there is no clear way of knowing.
However, if the flight crew says switch it off and pack it up, game over.