This is not entirely true and paper currency is still a means of payment and for now ATMs have not disappeared and are still used in general in several areas freely.
Inflation and digitization may be among the things that led to the limited use of automatic teller machines (ATMs), I mean that these machines do not give a lot of cash, and with inflation, the value of money withdrawn is greater than that which these machines can absorb. Countries such as Brazil, Turkey, and Venezuela, which were affected by hyperinflation, will decrease. Where is the percentage of use of ATMs.
In areas where there is no Internet, there are solutions for payment by EMS messages and some centralized solutions, which have been popular in some African countries. M-Pesa is a service that does this in Africa.
https://en.wikipedia.org/wiki/M-PesaThe reasons for the need to transfer cash have decreased significantly, and reliance on banks has become a basic form.