[Q] [REQ] RCS SMS App's

Which messaging app's are already supporting RCS?

I wish I could find something like or as popular as whatsapp and as advanced as it that supports sms as well...

I've been hunting and hunting to no avail maybe someone else knows.

I tried Joyn for metroPCS on my T-Mobile Note Edge but it says this device isn't supported.

But I'd really like a messenger/sms app that supports file sharing, video calling and piggy backing message delivery/receiving on wifi as well as the phones own network connection.