Iphone sticker machine can't send text messages

How come I can't send SMS 1 and there is no SMS service on my mobile phone? You can contact the local manual customer service or activate this function in the local business hall.

2. If the SMS center number is not set or set incorrectly, just reset it;

3, the signal is weak, there is no signal or the battery of the mobile phone is insufficient, resulting in the information not being sent normally;

4. Because the system is busy, especially during the peak period of sending short messages on holidays, it is suggested to try again later or avoid the peak period of sending short messages;