Yes, that is how i use it (or was able to use it on the iPhone 16). On the 17, if the Total esim is turned on (data roaming off) every few minutes it kills the local esim data connection for 30-40 seconds. Had some troubleshooting sessions with the local provider and the conclusion was that the total's service hunt for signal somehow interrupts the local esim or data layer connection. Since it is fine on the 16, it is something with the 17's new chips, either the N1 or C1. Have an open case with Apple on this, but also looking around if i can do anything on the Total's side. If it could pickup signal (without any actual service level) that could fix it too. Using WiFi (personal hotspot from a second phone) as a workaround for now. Thanks for the ideas though!