Haven't tried coinomi as I have Polo to exchange from one altcoins to another right now.. what I am looking at right now is to purchase Etherium from a credit/debit card so I can purchase Steem for it.
I have now a strategy where I can purchase Bitcoin thru banks or 7-11 outlets here in the Philippines, the fees though especially for micro-transactions with Bitcoin are quite prohibitive. I am looking for ways to do it with Etherium.