Where do you think they come from? Azur Lane's chronological settings is around 23-24th century. Settings-wise it's closer to Aoki Hagane no Arpeggio than Kancolle or Strike Witches.
Azur Lane is in the era where they have living machines that act like dogs, holographic communicators, and glowing blue cubes that can produce almost-limitless energy (which is where the shipgirls come from). If anything, iPhones would be considered obsolete.
