Interestingly, Tokyo has a much larger population than London with a very low crime rate. I can’t find specific numbers on stolen phones (only lost phone statistics are published) but robberies/muggings are 0.04 per 1,000 yearly versus London’s 2.83 per 1,000. Seoul has a similar rate to Tokyo, 0.4 to 0.5.

Also, is there even a single city of London’s size that is mostly retirement communities?