If you freeze the frame on the scene in the CTU conference room where Gael gets the call from Hector Salazar, the mobile displays *RINGER OFF*, although it still makes an audible ring when Hector's call comes in. Also, a time and date can be seen: 7:39P Oct 30 2003. This is obviously the time when this scene was filmed.
Another violation in the real-time format; Claudia is in the bedroom talking to Sergio, then the camera cuts to her walking outside the house to talk to Hector's guard at the shed.