1. The location of the SIM card and SD card slots are located behind the SIM Card cover on the left side of the device and can be accessed by pulling out the cover.
2. The SIM 1, SIM 2 & SD cardholder is located in the pull-out tray
3. The SIM card/s and SD card Can only be inserted in one direction, with the contacts pointing away from the display.
Note: With the Cat S52 you can have two SIM cards and the SD card installed at the same time.