Sounds simple. It doesn't work for me. The first day I had my Samsung Rogue, (name fitting) I did just that. Mind you, this was just before attending The Order of the Temple. After adjusting my backside and crossing my legs, the phone turned back on in my pocket. And it sings that lovely Verizon Tune. Maybe my pants are to tight, by I don't think that should be the cause. This has happened more times than I can count, and I got to the point that I would either lock it in my car or leave it hanging in my overcoat in the lodge vestibule.
PS: I will strongly recommend against a Samsung Rogue to anyone ever leaning that way, for many reasons. And I'm locked into this baby for another 9 months yet, as I'm to cheap to buy one while I'm under contract.