Despite being right handed, it feels more comfortable to place my phone in my left front pocket. Maybe because having a wallet in my right pocket predates using mobile phones. What feels most natural for you?
Right front is ONLY for my phone. Nothing else.
Trash goes to my right back pocket when there is no bin around and everything else is in my backpack since I do not own (and actually not even want) a car.
Agreed on front right solely for phone.
Front left is wallet and keys.
Back left is the trash pocket.
Back right is the utility pocket. Water bottle at a concert, garden gloves if I need to take them off for a bit, various hardware bits and bobs during house repair.