Can China Telecom's secondary card intercept all short messages?

You can't. The secondary card and the primary card are two different numbers and can be used separately. The setting of call interception in the secondary card has nothing to do with the main card, so its currency can intercept all information. China Telecom Group Co., Ltd. is a super-large state-owned communication enterprise in China and a global partner of Shanghai World Expo. It has been selected as one of the "Top 500 Enterprises in the World" for many years, mainly engaged in comprehensive information services such as fixed telephone, mobile communication, satellite communication, Internet access and application.