This is all fine until systems go down or someone hacks into your account.
Another threat is the demand that you a) have a mobile smartphone and b) share your number with every Tom, Dick and Harry. Never mind that people like me prefer to limit the number of people who know my mobile number. What about those who may not be capable of using all the functions of a phone, or who will be easily conned into giving away their security details to smooth talking con artists,. At least a PC or laptop is within your home so not as easily misused as a phone that is carried with you.
What's going on , on the street outside your home right now?

