Phone call notifications on a dual sim phone not working with SGF

I had to give up my Samsung phone for a dual sim phone, Sony M4 Aqua. I got GFM working with Lollipop from a download on this site. I can get notifications working, but not for phone calls. I've tried my best to search this problem, but I have not found a definitive answer. Is it because of dual sim? Is there any hope of getting call notifications working? I can live without sending reject messages, if I can just see who's calling.