I lost my iPhone.

If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

Try to remember the last place you were sure you had it and retrace your steps. If you did not set up Find My iPhone there is no way to look for it electronically.

tilekshi Said:

"I lost my iPhone.: I lost my iPhone. And can’t see from my find iPhone app. Because it wasn’t on. Please help me."

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For Note:

Keep Personal Info Off: These is an open-ended forum, in which case they are available for all those out there to view. So, if someone has your Serial Number, someone can know to whom this device pertains. So, I have asked the Host to remove your image.