when I researched all plans here is what I found in pricing.
T-mobile is the cheapest overall for family plans but doesn't have as good of coverage as some of the others but for us seems to work out well. We have 4 phones on 700 minute plan with a basic plan of no texting or data. Free t-mobile to t-mobile which is what most of our minutes are because most of the kids friends have t-mobile as well. All 4 phones on the family plan including all the fees and taxes are 102.00 a month. You can add texting for 20.00 a month for all phones on your plan. I think data cost around 30.00 per phone but can't remember when I checked on that last. They have excellent customer service. We have had t-mobile for 9 years and have been very pleased with them. The phones seem to last longer too.
Verizon was the next cheapest and has more coverage throughout the country. My dad is a truck driver and uses verizon and seems very pleased with it. He used sprint for many years before he switched which also has good coverage. His main reason for switching was the sprint phones didn't last much over a year.
Sprint probably has the best plan if you talk a lot and use the internet data a lot. They have a plan that has free minutes to any cell phone regardless what company they are on. The downsides of sprint is the customer service is the worst I have ever seen and their phones don't last and usually have to buy a new one every year.
Go online to each of their websites and click on plans and design your own plan according to what you use and compare prices. Watch the fees on some of those data plans. Some of them make you have data on all your phone lines on your plan which can be very expensive especially if you only need it on 1 or 2 phones. Sometimes it's cheaper to have 1 single phone plan with all the data, texting, and everything you want on it for the person that would use all of that and have a family plan for the rest of the family with calling and texting only. It all depends on what you want on what prices it cost. Just make sure if you have texting you get the unlimited texting plans especially if you have kids on it. They can rack up 1000's of texts in a few hours.
We have 1 phone with texting and data which is considered the family phone so when the kids want to text their friends they use that phone. We don't have a house phone anymore so that phone is our main house phone.
I don't want my teens even thinking about the temptation of texting and driving so we have the basic t-mobile family plan without texting and those are the main phones they carry with them all the time. It works out well for us to call them whenever we need to but don't have to worry about them texting and driving or texting all the time when it's inappropriate. I get tired of going everywhere and seeing people texting. A lot of young adults can't even work their jobs without texting. Really? how inappropriate. I have told several working teens and adults when I catch them that if I was their manager I would fire them on the spot/no questions asked if they even had their phones out on my time whether it be a quick 10 sec text or a phone call. You can check your phones on your break but not on work time.