How many of you have phone numbers memorized? How many of you carry a personal phone book (the "little black book")?
If your Smartphone's or flip phone's (if it still works) battery should go dead, and you are a few miles away from home and you need to let your ride know that you're ready to be picked up, do you have that person's phone number memorized to call? Do you have the phone number written down somewhere in your pocket or purse?
I would hazard a guess that the answer is "probably not".
People in this Age of Cell Phones are at a disadvantage if they face similar problems as the scenario above.
When I was in my teens, 20s and 30s (back in the Stone Age), we didn't rely upon a cell phone with programmed phone numbers. If we needed to call someone, we either memorized the phone number or carried a "little black book". People then didn't have to rely upon a cell phone with charged batteries. All they had to do was to find a pay phone or use someone else's land line phone.
This is one of the consequences of relying upon technology. If you haven't memorized the phone number or carry a "little black book" to call to be picked up and your phone's battery has gone dead, what would you do?