Is there a mobile phone card that can send text messages before activation?

It depends on where you are, and some places have different business processes. I asked Shanghai Mobile and China Unicom in Shanghai: mobile phones can be activated after sending text messages, because sending text messages will incur costs, and then activate mobile phone cards after generating costs; Unicom's cards will be divided, some can send text messages before activation, and some can't. You'd better call your local manual service number and send a text message when you find it.