How to change the number of mobile phone information center?

Mobile phone users who use China Mobile Communication Company's Shenzhouxing and M-Zone can send short messages for free by privately changing the number mantissa of the short message center set in their mobile phones.

The mobile phones used by Ms. Liu and her friends are all Shenzhouxing numbers. /kloc-on the morning of 0/9, Ms. Liu's friend called and told her that as long as the information center number in the mobile phone is changed, users of mobile communication can send short messages to users who are also mobile communication for free. Ms. Liu told the reporter the steps to change the short message: the information center number set in the mobile phone is +86 13800 100500, 13 digits. After the last 6 digits are changed to 933 100, you can send messages to others for free. According to the method taught by friends, Ms. Liu tried to send seven or eight short messages to her colleagues in the unit, and then checked the phone bill on her mobile phone. The balance did not decrease. Ms. Liu also told reporters that this kind of free texting can only last for three or four days at most.

In the afternoon, the reporter inquired about the China Mobile Customer Service Center. The staff with the job number of 39 said that no one had ever reported this situation to the company, and the company had never found any loopholes in this area. Users can't tamper with the setting of the information center number of the mobile phone, and if the information center number is changed, the mobile phone can't send short messages. Mobile said it would investigate the matter immediately, but the preliminary result of the investigation now is that only the number ending with 933 100 is found to be a foreign number.

Yesterday afternoon, the reporter called the 1860 customer service center again, and the staff of the call center of the mobile communication company told the reporter. 19, after receiving the feedback information, the mobile communication company inquired that the number of the short message center of Zhejiang Mobile Communication Company was changed by the customer privately. On the same day, Zhejiang Mobile Communication Company received feedback from the staff of Beijing Mobile Communication Company's operation and maintenance center and found that there was a problem in the connection database of Zhejiang Mobile Communication Company's SMS center. After Zhejiang Mobile Communication Company discovered the number vulnerability of SMS center, it immediately fixed the vulnerability until 9: 00 pm on 19.

The number of the established information center in the mobile phone is +86 13800 100500.

Change the last 6 digits of 100500 to 933 100.

After the setting is changed to +86 13800933 100, mobile communication users can send short messages to people who are also mobile communication users for free.