I have a pre-pay phone for myself; dh's office supplies him with a smart phone.
My monthly cost is pretty low; I usually load 90 days for $20 = $-7 a month.
I can load different amounts of minutes for specific periods of time, like 30days, 60, 90, 6 months or a year. My phone has text and each call or text has a minimum deduction. My minutes roll over, and I have tons of them.