In Batman Begins, after Bruce is done training and decides to head back to Gotham, Alfred shows up in a plane to pick him up. How did Alfred know where he was? Did Bruce have a phone to call him or something?
Bruce is highly resourceful. He did cross continents using nothing but his wits, twice (firstly when he ran off in Batman Begins and when he returned in The Dark Knight Rises).
Considering who he is along with the above, does one really have to suspend their disbelief when considering how he notified Alfred of his location, considering EVERYTHING else that happens in the film and its two sequels?
TL;DR - He asked someone if he could use their phone and reversed the charge.