One thing that jumped at me instantly when reading this was that it matters if you're a slender bodied person or a hulk of a dude walking down the street with your phone in your hand. If you're the former extra care and attention must be given specially in busy and unsafe places near metro stations.

It also came off as wide eyed to keep referring to the thief as "they", most certainly the thief on the bike was a guy and keeping this in mind can be useful information and should have been at the top of this person's "pro tips".