What are the mobile free SMS service center numbers?

Do you have a free service center number? If you want to set up a free service center number, sending text messages is free. I advise you to give up.

If you forget the service center number, you can take someone around you's mobile phone to see what his service center number is, or unplug the battery and turn it on, which will usually be set automatically. In addition, I tell you that the service center number you set must be the service center number to which your card belongs, so you can't send a message. The format of the central number is+8613800xxxxx500, where xxx represents your area code. If the front is zero, remove the zero; If the front is zero and there are only three digits, put the zero at the back. For example, the area code of Maoming is 0668, representing 668, and the area code of Guangzhou is 020, representing 200.