Is it true that Telecom 19 yuan unlimited flow card?

Telecom's 19 yuan unlimited flow card is a flow card introduced by China Telecom, which can provide unlimited flow. In fact, it is an Internet of Things card, not a real mobile phone package flow card. Without a mobile phone number, you can't make voice calls and send text messages. Traffic can only be queried and recharged at designated locations, and official apps are not supported for querying and recharging. Telecom 19 yuan Unlimited Flow Card is just another name of the Internet of Things card, and there is no substantial difference.