What is the name of a card that can only use traffic and can't make calls?

This kind of card is called object-linked card (or pure flow card).

IOT card can't make phone calls or send text messages, has no mobile phone number, and can only use traffic, so it is also called "pure traffic card".

IOT card is a product introduced by operators for networking IOT devices, such as * * * sharing bicycles and vending machines. According to the regulations, IOT cards cannot be used for personal user terminals (mobile phones, tablets).