Would I be mistaken to envision use of a late-model, but unused smartphone (one that I would trade in) to be of good use as a prep item? This is what I have in mind: remove SIM card (OPSEC), use strictly as WiFi device right now to download apps that can be used off-network, such as GridNavFree, BackCountry Navigator, GeoCam, compass...some also are capable of receiving FM radio (iPods, as well). I have eBooks downloaded as well, such as FM 21-76, an almanac, star chart, atlas, encyclopedia, and various novels, movies, and music. Zeroizing all the cached web info and cookies would go without saying. Apart from being useful, it could also serve as kind of a time capsule if the absolute worst happened and you wanted to leave behind voice recordings and photos. I suppose that you could retain the SIM card, and in the worst kind of SHTF situation, use it in your old phone as a spoof or electronic bait. Thoughts?