I doubt now that it's a scam. Customer Service responded and I will probably receive my tokens. I think they will develop a state of the art mobile.

Regarding mining they have a mining plan and for the higher returns an activation fee in ETH is needed, so not technically impossible, but maybe a marketing gag or even something really new:
https://imgur.com/a/N31yoED

Source: https://minephone.bitwings.org/#product