I recall being at a festival in my Japan hometown and sitting down to take a break . Within minutes , a group 4 of Middle Eastern guys plopped down next to me and began to pepper me with questions :
Do you live here ?
Do you work on _____base ?
Are you in the military ?
I gave vague answers - they weren't aggressive or threatening but the quiz went on for several minutes . Finally , I stood up and said " Gotta go now , enjoy the festival !"
Suddenly one of the looked at me and said " Give me your phone number , I will call you ."
Seriously ? At this point , the guy didn't even know my name .
Luckily , I was thinking on my feet that day and told him it was a government-issued phone and I was not allowed to give out the number . I escaped while he was still processing that one .
Maybe you could use a variant of that ? My phone is only for work , family emergencies , zombie apocalypse ?