Can you just have a mobile phone number that can accept short messages?

There is no such mobile phone card at present, you can ask the operator.

For example, if you just want to receive short messages, that's a telecom operator's package problem. Let the operator recommend a monthly fee of several dollars a month. You can call customer service or ask in the business hall to tell them your purpose. They will introduce you to the right set meal. As for the number of calls, any mobile phone can receive short messages.