Phoneum project is not the newest thing out there or something unheard. The interface is ok, the wallet looks decent, it is slow and it doesn't affect phone functionality.
In short, it is working.
Phoneum is a mobile only cryptocurrency which can be mined using your smart phones! The app is already available on Google Play, Phoneum is a decentralized cryptocurrency, designed to deliver a simplified user experience and platform that enables all users, regardless of technical aptitude, to fully participate in the new cryptocurrency economy.
Phoneum 's mission is to provide equality to all by making mining available to everyone. Mine from the comfort of your mobile phones! Crowd sale starts on in June 21, 2018.
I'm giving Phoneum a 4/5 because the app is still not available for iPhone users.
Know more about the project via phoneum.io