[kovar]

Yes, I have. And been on my way in less than 15 minutes.

There are several reasons that one might turn over one's phone, all well documented in the media. The primary two are:

1) Voluntary cooperation with a request 2) Search incident to arrest

(Obligatory WTF on downvoting: I point out reasonable information and a technical challenge with doing this in the field based on personal experience as a forensic examiner, and I get downvoted?)

[burgerbrain]

1) Never volunteer your property to be searched. That's just common sense. 2) Well that's hardly a traffic stop anymore. They're pretty free to take their time at that point.

(I didn't downvote you)