diff --git a/src/caller/mod.rs b/src/caller/mod.rs
index 7eadcad..9839b1a 100644
--- a/src/caller/mod.rs
+++ b/src/caller/mod.rs
@@ -30,10 +30,7 @@ pub mod contact {
 
         impl AddContactRequest {
             pub fn is_valid(&self) -> bool {
-                self.phone_number.is_empty()
-                    || self.firstname.is_none()
-                    || self.lastname.is_none()
-                    || self.user_id.is_nil()
+                !self.phone_number.is_empty() || !self.user_id.is_nil()
             }
         }
     }