If I could completely get rid of my mobile phone service, I would. But I'm not comfortable doing that given I have two small children, don't have a land line at home, and live in huge metro area.
Prepaid phone services are now offered by all the major provider. The variety of plans and options for prepaid service, revival that of monthly service. After reviewing the plans, I was able to determine that prepaid mobile phone service is an option for anyone who talks less than 200 minutes a month. However, if you talk more than 200 minutes the prepaid service become more expensive.
In the end, I decided to stay with my monthly service plan of 450 minutes for $34. It is cheaper than what I would be paying for the same service utilizing a prepaid mobile service plan.