The mobile hotspot feature is a nice capability of the Verizon iPhone but I have some concerns about its convenience. 1. Will I have to turn the mobile hotspot setting on the iPhone on and off each time I want to connect another device, so that it doesn't count my iPhone usage against the 2GB limit when I'm not using other devices? The answer seems to be no, that the iPhone disables the mobile hotspot automatically when there are no devices connected. But I haven't seen this stated at Verizon's website, only in articles elsewhere. 2. If I'm using the mobile hotspot for, say, an iPad and a MacBook Pro, and I walk into a free wifi area (like a public hotspot or my home network), how do I ensure that the iPad and MBP use the free wifi instead of the mobile hotspot, again so I don't use data from my monthly allocation? 3. I get great battery life with an iPad Wifi+3G with monthly mobile service. If I use an iPad Wifi (no 3G, no separate service) and rely on the mobile hotspot instead, will I drain my iPhone battery so quickly that it won't be a practical alternative?