I used to tell my students there was no such thing as a "dumb question," but the one I'm about to ask may sound really *dumb* to some electronics experts. However, I hope respondents will just make this a "teachable moment" for us both. Here goes .... For an extensive research trip to Europe late this summer, I need a computer (e.g., writing, language translators, maps, GPS) that can also perform as a phone. I will get a local GO-SIM card for economical phone use, and I know the I-Pad 2 with 3G can also take a SIM. BUT ... communication will *not* be economical if I have to buy a second SIM for a cell phone. SO ... is there any way to make the I-Pad 2 with 3G *act* like a phone -- and I don't mean by using Skype, but rather, by using some sort of VOIP???