How much is a iPhone bill monthly?

Was wondering how much a iPhone bill is plus the best plan to get anyone know?

My husband and I have the iPhone 4s Suri and our phone provider is Sprint. We pay about $220 monthlt for both phones so we pay about $110 for each phone. We have unlimited texting and phone calls. We pay $30 a month extra for Internet. I've had atat and Verizon before. So far for us Sprint has been the cheapest. Is the iPhone worth it? Most defiantly! Best phone I've ever had! It's my best friend lol. Hope I've helped!