What if the mobile phone is forbidden to send text messages?

There are many situations. It may be that your group SMS has been blocked. You can wait until next month or go to the counter to reopen it. The SMS center also has the wrong number setting, so you can just check the tutorial online. There is also the problem that some cards cannot be recognized by mobile phones because of iccid when cutting large cards into nano cards. Just go to the business hall and reissue a small card that is directly a nano card.