To be fair, that's probably fairly low on the list of weird things that have happened to Ritsuka. Though the more she hears about this place, the more suspicious some of this is sounding.

"Oh, let me see..."

Give her a second to take it out and try just that! For that matter, there's only the briefest moment of hesitation as she recalls just how these things work, but sure enough, it does indeed seem to be 'her' phone.

"... Huh."