Why can't I send a text message when I send a group message?

Your card is locked. Call customer service. Operators in different regions have different settings. For example, if a mobile card in Shaanxi sends short messages at a speed exceeding 100 cards per hour, the card will be locked, even if you send more than 200 short messages in one day without exceeding the speed limit.

Operators send text messages in groups for fear of causing complaints and will think that your card is automatically locked! Call customer service or go directly to the business hall and ask him to unlock it for you.