A cheap, no-frills, just lots of minutes cellphone plan?

i’m looking for a good cell phone plan, with just the basics. i’ve been looking all over, but haven’t really found anything right. i don’t need texting or email or photos or anything snazzy like that. just 800+ minutes a month for cheap. most of my calls will be to other cellphones in the area. i don’t travel out of my city very often, so i’m not too concerned about roaming charges either. free nights and weekends would be nice, since maybe half of my calls will be during that time. any suggestions? i’m hoping i can find something for under $50 a month. also, i live in west Michigan.