Huh. Myself and other cashiers never put stuff back that way. In fact, once the carts are sorted, the cart attendant pushes reshop carts to the back and sales floor worries about some of them, and so on. I carry my phone on me but only to show guests how to use cartwheel, if their phone can't connect to the wifi, or to calculate certain things. When it's slow, I go up to guest service to help sort reshop and settle returns. If I can't do any of those things, I zone the checklanes, green promo, or one spot. I'm very hardworking myself and am asked often to cover GSA/GSTL breaks when the ETL-GE is there because he likes my performance so much. I even cover electronics sometimes.