How to set the SMS center number on Apple's mobile phone?

Generally, you can set the information center number in Mobile Information-More (menu key)-Settings-(More Settings)-SMS Settings-SMS Center (Information Center). The number of China Mobile SMS Center is +86 13800XYZ500, where XYZ is the part of the area code to which your number belongs, and 0 is added at the end of less than three digits. For example: Nanjing area code 025, XYZ corresponds to 250; Shenzhen area code 0755, XYZ corresponds to 755.