Just what we needed to know. And we're terribly sorry for your prior experiences. But it's great to know you're doing everything right to limit usage on your jetpack by turning it off with the switch on top (which is the best option for this particular device). In regards to your question about using the iPhone 4 as a hotspot, I can confirm that it is fully capable of doing so. Additionally, if on the Share Everything plan, you need not pay extra for hotspot capabilities but only format the plan to suit your usage http://bit.ly/xdDajD . And hey, you may still get some good use out of your jetpack if you travel or are on the go.
Follow us on Twitter @VZWSupport