Has anyone tried to upgrade their W500 with a 3G module to make it similar to the W501? After researching I found out that the W501 uses the following 3G module which can easily be purchased on ebay, etc and not so expensive. Huawei EM770W huawei em770w | eBay Anyone who has opened up their W500 can check if there is a slot to put in this PCI-E card? Also what about the SIM card slot / tray ? Do we need additional hardware or the W500 already has it?