The best thing to do is find a plan that best fits your needs. Consider coverage area, usage limits, and cost. I use the T-Mobile $30 monthly plan. Now their coverage is pretty good in the city, but can be spotty in the outlying areas. I don't really use the phone to talk a lot, mainly use for messaging and data. The plan comes with 100 minutes a month, unlimited messaging, and unlimited data (first 5GB at 4G) The plan fits me to a T.
I stream audio at work 6 hours a day and listen to podcasts on my drive to and from work and still only use about 2 GB in a month. I get poor phone signal at home, but T-mobile has wifi calling so when I'm at home it's not a problem. There are also numerous apps that you can use to call over your data plan or wifi so I only use about 25 of my 100 calling minutes a month on my plan.
I tell everybody that I basically got unlimited talk, messaging, and data for $30 a month.
Plus that T-Mobile chick has the best commercials.
It beats paying $80 or more and getting locked into a plan for 2 years.
Now this might not be for everyone, but like I said, do some research and find a plan to fit YOUR needs.