Husbands style of "babysitting". Help!

Ok I'm so annoyed that I ask my husband to watch our little girl for ONE hour, while I shower and do some things around the house- and every time I look in the nursery, he is on his phone and not even looking at our daughter! (She is 3 months old)
I was so mad I didn't say anything because I knew it would turn into a fight, but I'm soooo bugged. What should I do? Tell him there's a "no phone rule" when he's with her? I feel like a nagging wife!
P.S. I refuse to say he is babysitting when it's HIS OWN CHILD!