This one is a bit more complex. Remove the side pieces with a ID or plastic card, remove the 5 screws, and carefully pop off the rear cover. I plan to add 3G to this tablet very soon. Parts list: mPCIe socket http://uk.farnell.com/jsp/search/productdetail.jsp?sku=1698821 or http://uk.farnell.com/jsp/search/productdetail.jsp?sku=1698820 3G card and antenna http://www.ebay.com/itm/Ericsson-F3...325?pt=LH_DefaultDomain_0&hash=item230b570b8d Sim card reader http://www.**************/fm-store/...ebooks-Solderless-SIM-Card-Reater-Socket.html Should be able to solder in the connector and pop it in.