Choices / Phone
STEINS;GATE RE:BOOT Phone Choices Guide
The official product page confirms that answering, replying to or ignoring phone activity can affect story progress and endings.
Confirmed system
RE:BOOT uses a Phone Trigger System involving incoming calls and emails. This page does not claim which specific response leads to any route.
View the official STEINS;GATE RE:BOOT product source ↗Choice records
Data pending
No phone event has been published as a verified route instruction yet.