Why can't I connect to another iPhone with Report-IT?
Report-IT to Report-IT connections are not supported largely due to the same reasons outlined in Why can't I establish a connection to Report-IT from my Codec?. In addition to this, there is no real scenario where this is applicable for professional broadcasting. I.e. Report-IT is intended to be paired with a studio codec for field to studio communications.
For a low cost studio solution, customers should consider purchasing a Tieline BridgeIT.