they can get bitcoin in paper form like what you get when using Bitcoin ATM.
pieces of paper with public and private address after that they can import the private key to any wallet "just show the private key to any scanner" and get the money.
Important point
you must have some knowledge and internet access to use bitcoin.
Currently, this will be the advantage using bitcoin as a form of payment for ordinary people. An indigenous people which dont have a knowledge to the process will be left out in the process. Access with internet will never be free to such extent that a beggar can afford it.