Re: "Our users are hanging on to their iPhones a little longer"...
I actually have a few landmines here in the Research Centre; someone thought that it'd be nice to build a simple cheap 'ground penetrating' radar with 500 Watts CW at a few Megahertz, having tuned the RF to a nuclear resonance of some particular nitrogen bonds in the plastique. I built the tin box, filled it with landmines, and from not very far away blasted with high power, got no coherent responses. Did manage to get really good 'remote NQR' return signals from a bottle of di-nitro-toluene when that was tried instead.
er... I prefer experimenting with things other than deflagrating hardware nowadays, tho' maybe I should try my rNQRradar on a spare fruity 'phone?