My boyfriend and I have Sprint, and we both have the HTC EVO. We have the Everything Data plan which is 1500 shared anytime minutes, unlimited data, unlimited calls to any mobile phone (any carrier) anytime, unlimited texts, unlimited nights and weekends starting at 7pm, unlimited picture mail, and voicemail and caller ID. We pay $148.99 every month. The everything data plan is $129.99 for us both, but we have premium data add ons of $10/phone. Not all phones have the extra charge. We have $13 off because of our credit union (they have different discounts you might qualify for), so after taxes and fees it's $148.99. The unlimited data is everything online. Emails, youtube, facebook, everything. I think we have sprint tv or something on there too. Also Navigation is free, which I love and have used with my job
It's been great with no extra fees.