Eventually this would be no different: Starlink can provide (firewalled) data service to iPhones to support messaging apps.
Speculation is that initially there would be a small number of satellites periodically passing overhead, leading to the 30 minute send/receive times, and likely not supporting non-SMS messaging apps well.
Speculation is that initially there would be a small number of satellites periodically passing overhead, leading to the 30 minute send/receive times, and likely not supporting non-SMS messaging apps well.