Dell Precision 15 Series Manual Online: Installing The Subscriber Identification Module 3. Press the sim card and remove it from the sim card slot. workstation, the Dell Precision M combines incredible Expansive DDR3 memory with four DIMM slots for up to . Slots: 1 full and 2 half Mini-Card slots. Trademarks used in this text: Dell™, the DELL logo, Dell Precision™, Precision ON™ Locate the Subscriber Identity Module (SIM) card slot in the battery.