What to do?

What do I do when my 16 month old only wants his dad? I try to tell him his son wants only him but he doesn’t seem to care much. Like he’s crying out for him and i legit have to say “your son wants you” “ he’s crying for you”

Needless to say he’s much more interested in facebook or his phone.

I tried my best to comfort my son but it’s so hard when the one they want isn’t me. I tried.