Sprint allows you to use the "snap dialer" set up as well and they charge by the kb...not cheap..I bought their "Connection Card" and pay $60/mo for unlimited access..it works great all over and there are no cables. The speed is faster than a dial up...
Sprint charges an additional $10/mo for unlimited internet acccess from my old N400 Samsung phone. Along with snap dialer software, it's very easy to use and works well for me and $10/mo you can't really beat it.