The punt SIM, of the 2 SIM phone, will be Hidden far away, per the great recommendations here. Note , I am solving for;
1. OH is an amazing sleuth for physical things and clues (Sherlock Holmes level genius, yet NOT with any “cheating” suspicion, weirdly. . She just notices f-ing everything! )
2. Still refers to “the information super highway”. So at least 5 rungs below “clueless’ on cyber, internet, and tech. Tech level “cognitive challenged”
I like the “if the car breaks down and the iPhone is dead” lie. Hadn’t thought of that.