I was thinking the same thing. How many of us blindly save contact data to our phones or other PIM software, then back it up online to a Google, Apple, or Samsu

I was thinking the same thing. How many of us blindly save contact data to our phones or other PIM software, then back it up online to a Google, Apple, or Samsung service? Do they need my contacts' consent? If I were to ask my friends, "Is it okay if I back up your contact informarion to Samsung's online service?" they would think I was weird for asking.