Possible to run Verizon & AT&T in dual sim phone at same time?

I'm wondering if there is a dual sim phone out there that can run Verizon and AT&T at the same time.

Would be cool to run my Xfinity $1 a month unlimited talk and text along with a free freedompop LTE sim for data in a single phone.

LeEco Max 2 - Chinese or Indian version