Or just take a different phone with you if you're that worried about it.
Or keep your phone in your pocket and give them one of these:
https://imgur.com/gallery/history-of-telephone-pre-2000-6YCg...
alt Hacker News
Or keep your phone in your pocket and give them one of these:
https://imgur.com/gallery/history-of-telephone-pre-2000-6YCg...