Definition of SIM card. : a card that is inserted into a device (such as a cell phone) and that is used to identify a subscriber on a communications network and to store data (such as phone numbers or contact information)A SIM card is a microchip in a mobile phone that connects it to a particular phone network. SIM is an abbreviation for ‘Subscriber Identity Module’.

As popular as uber is, its not in all countries and cities of the . it should be noted that in order for uber to operate, both the uber and the client need to have internet.. And internet has not reached all countries and cities ,For that reason alone i can say with certainty that uber is not world wide but its popular in some cities even in third world countries

Covid 19 has affected economies of different countries differently, just the fact the movement and transport sectors have been discouraged, that alone affects the movement of products from there places of production to consumers and thus affecting the flow of cash in the economies. Also the production sectors were forced to lay off some workers or close down completely, that means the people who were layed off now have no money to spend that still affects the circulation of cash since the low of demand and supply are not being met.