Hong Kong Wanzhong Card cannot send short messages.

The balance is insufficient or the SMS function is not enabled.

The balance in the card is not enough to pay the SMS fee, so you can't send SMS. In addition, some Wanzhong cards may only use the call or internet access function, and Hong Kong Wanzhong cards cannot send short messages without the short message function.

Whether the balance in the check card is sufficient. If it is not enough, you can consider recharging the card. Wanzhong Card has no SMS function, so you can contact the operator to apply for SMS function.