We have a shared plan. Unlimited text and talk with 4GB shared data on 3 iPhones. The plan is 70 per month and then each iPhone cost 40 per month per phone. Yes it sounds expensive but it's really not for the amount of service we are getting. From what I'am reading we are to going to be charged more just for turning on the personal hot spot feature. I also understand the overage charge if we exceeded the 4GB per month. AT&T has a very nice data usage calculator on their website. Downloading music and streaming video are the highest usage. It looks like with our plan we can surf the web for 300 hours per month plus email. Social media usage is even less unless you are posting pictures. Seems like we will be fine and happy campers now that we have dependable Internet service.