For us, it's actually a little less than $23 per phone! My hubby, my mom, and I switched to Ting (a cell phone service which uses Sprint's network but is quite a lot cheaper) about 2 years ago. Our phone bill for 1 smart phone and 2 flip phones comes to a grand total of $66 a month!
Your bill is based on your useage--ours varies between $57-$74 for 3 phones with $66 being the average. Most phones will easily transfer over so you may not have to buy a new one, and when you sign up you get a free $25 toward either a statement credit or a new phone! Plus, there's no contract which makes it especially awesome. I will never, never go back to Verizon, that's for sure!