If the salesperson "helpfully" told you about a $150 deal on any new phone, that's why they renewed you: those deals are dependent on you renewing for 2 years. You ought to be able to return the phone within either 2 weeks or 30 days, to cancel that; of course, I don't know how long it's been.
We have Sprint, and it's ok. Their customer service is supposed to be getting better, but I don't think I can really recommend them unless you want their network (DMCA)/devices/whatever. My folks have T-Mobile, and I haven't heard any complaints, and if they're using it, that must mean it's cheap. Mom does drop out more frequently than I do, but she's more often driving when she talks (I almost never lose signal, though).
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We have Sprint, and it's ok. Their customer service is supposed to be getting better, but I don't think I can really recommend them unless you want their network (DMCA)/devices/whatever. My folks have T-Mobile, and I haven't heard any complaints, and if they're using it, that must mean it's cheap. Mom does drop out more frequently than I do, but she's more often driving when she talks (I almost never lose signal, though).