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Does SMS sniffing affect China Telecom?

No, at present, only China Mobile and China Unicom are in GSM mode under 2G, while China Telecom is in CDMA mode under 2G. Telecommunications can naturally be immune to GSM sniffing and will not be affected. Users of China Telecom can change the mobile phone numbers of Alipay and online banking to those of China Telecom, so that 100% can avoid being smelled by short messages.