This is only half correct. At least for my 7140 128gb 5Y10. The SIM card is there, but its blocked behind the solid plastic for some reason. I have no idea why they would include the SIM reader but not allow access to it... and this isn't their only recent product that does it, the latitude 7350 also has the sim card reader, the only real differences between the two is that the 7350 comes with antennas while on my 7140 I had to add antennas, and the 7350 can have wwan added without any destruction but the 7140 you have to carve/file down where the SIM slot is. I got the antennas I used here: http://www.ebay.de/itm/MHF4-IPX-Lap...-WWAN-3G-4G-LTE-NGFF-M-2-Module-/191376598350 Here's a pic of my 7140 with the 5808e installed and working.