I'm married, and my husband and I have a joint plan. Our bill generally runs around $180. When I was single it was around $70 for my share of the bill (my father paid it, we had a family plan), so for two of us $180 isn't horrible, particularly when you consider that we do have data (internet)/texting on our plan as well. Hubby uses the data more than I do, because he travels a lot for business and when he's on the road his phone functions as his computer, since he's already lugging around a company laptop for work.

ETA we have Verizon. That's also what my parents use. Was a bit of a hassle getting Verizon to take me off my parents' plan and give me my own bill, but not hugely so.