The real question should be, what is the actual point of the phone?
I think that the phone is just a sort of symbol of the second life which is in her memory. When She died she takes also the memory of a second person so she has two memory herself and another person
And second memory is in our time, it's because of that the phone I think
Update : She obtains the phone at a auction sale but I think she is not the only one to be reincarnated (⊙…⊙ )
Yeah i too just looked at the raws as far as i got it (an i may be totally wrong) it seema as if their world juat gets random stuff from other world and dont know anything about the stuff and just sell thwm at auctions and because nobody could find out what that tging does she bought it because as a reincarnated person she knows
She will get a Smartphone, nobody knows what it is but she bought it in a auction
That title confuses me does she already have a magical smartphone?Does she get a smartphone at some point of the story? How does she even get them? This story looks like a medieval like setting so it cannot be from this world? But she did have modern looking contact lenses earlier ... so maybe??