I'm in the US too - it's eye-wateringly expensive tbh, but I am at least getting 'value' for money, my contract is around $130 a month with Verizon but that does include unlimited calls, texts and data - and I did use around 8,000 minutes and 3gb of data haha
3G coverage is great though, pretty much everywhere and get around 160-200k/s so most of the time I don't even bother using Wi-Fi just use 3G instead.
8000 mins a month. 5 hours a day, every day. Epic.
Watch out for the headaches and the double vision. You're in the states? Check your medical insurance too.