This is a bit of a straw man, TBH.
For one thing, "LLM-in-a-box" doesn't necesssarily imply a device as small as a phone.
For another, you'd need to convince people that the iOS Foundation model is the "frontier" of LLMs that run on phones when it is really not. AFAIK it is noticeably outperformed by the Gemma 4 E2B model and certainly the E4B.
https://blog.google/innovation-and-ai/technology/developers-...
Here is a common-or-garden youtube video that includes a demonstration of how much better the E2B is:
https://www.youtube.com/watch?v=sTxyBUbdZcA
Whether this idea (LLMs for emergency/survival scenarios) has value, I don't know, so I am not offering an opinion, but you should approach it with a good faith argument.
I am an LLM cynic but I suppose if I was to be without connectivity but with power for a while, a device with the Gemma 4 E2B or E4B model on it might be helpful or interesting to have. If such a device had the 12B QAT model on it, that really would cross the line to utility. Not sure it has value in the OP's scenario, still.