"Call your friend."
Translation:E kelepona i kou hoa.
I was just trying to figure that out too. On this discussion, KaimanaSoliai said
“iā” is used to proceed an object when that object is either a person’s name or a pronoun.
So maybe it's just "i" here since it is a possessive + a noun, rather than specifically a pronoun or name, even though it's a person ? This is my guess :)