544.7.4 World clockEnter the “World clock” submenu, where you will initiallysee the world clock-browsing interface. Use the option toselect the “Daylight saving time for foreign city” on oroff.4.8 Settings4.8.1 Dual SIM Settings Dual SIM open SIM1 and SIM2 are all power on. SIM1 open SIM1 is power on, but SIM2 is power off. SIM2 open SIM1 is power off, but SIM2 is power on.4.8.2 Pen calibrationClick anywhere on the screen with your stylus to startcalibration;4.8.3 Phone settings Time and Date Including default city time zonesetting, time setting and time format setting.