I have been lucky enough that the person who found my phone was VERY kind hearted and contacted me back so i could pick it up.
Merci Beaucoup. Dank je wel. Thank you so much stranger.
Lesson of the day:
Good people still exist (YAY) and I should behave with the same intensions.
Always leave some business cards with your phone.
Be nice to children playing next to you, they might be the ones bringing your phone to their Mom next time.