Can I set SMS rejection on my mobile phone? Is to make it impossible for the other party to send text messages. The other party's mobile phone shows that it hasn't been delivered yet or something?

It can only be blocked by software methods and cannot be rejected. Those who spend money to send text messages to complain about failure can only be blocked by software. Those who spend money to send text messages to complain about failure can only be blocked by software. Those who spend money to send text messages to complain about failure can only be blocked by software. What is related to operators is that people can't refuse to send messages when they spend money, but they can only complain if they don't refuse to send messages when they spend money.