I say my wife does but she always blames our children. She's probably right.
Too early to tell, but probably me.
I lose my cell phone on a daily basis. So me, for sure. My husband rarely loses things and he's patient to help me find my phone every evening.
I think men have an easier time keeping track of their cell phone because its always in one of two places. (At least its this way for me.)
Its either in my pocket or its charging.