OK, so the Huawei S7 is supposed to be a phone & computer. I've got it working as a computer, and I can get a really really cheap phone plan through Google to use it as an IP phone. But what if I wanted to use it over the regular phone networks? I probably just need to slip a SIM card in the slot. So which networks offer service that will make my S7 work as a wireless phone? OTOH, it looks a little odd holding a tablet to your ear, do you think a phone app with a picture of a phone handset or a cell phone face would make it better?