[EyeB]

think the Sprint 3G part means Sprint's network, when I checked the sprint page, it says (on our network) next to the data/minutes/texts

edit: got curious too and this part of the terms/conditions seems interesting

Our data services may not be used: (i) to generate excessive amounts of Internet traffic through the continuous, unattended streaming, downloading or uploading of videos or other files or to operate hosting services including, but not limited to, web or gaming hosting; (ii) to maintain continuous active network connections to the Internet such as through a web camera or machine-to-machine connections that do not involve active participation by a person; (iii) to disrupt email use by others using automated or manual routines, including, but not limited to "auto-responders" or cancel bots or other similar routines; (iv) to transmit or facilitate any unsolicited or unauthorized advertising, telemarketing, promotional materials, "junk mail", unsolicited commercial or bulk email, or fax; (v) for activities adversely affecting the ability of other people or systems to use either Sprint's wireless services or other parties' Internet-based resources, including, but not limited to, "denial of service" (DoS) attacks against another network host or individual user; (vi) for an activity that connects any device to Personal Computers (including without limitation, laptops), or other equipment for the purpose of transmitting wireless data over the network (unless customer is using a plan designated for such usage); or (vi) for any other reason that, in our sole discretion violates our policy of providing service for individual use.Unlimited Use Plans. If you subscribe to rate plans, services or features that are described as unlimited, you should be aware that such "unlimited" plans are subject to these Sprint Prohibited Network Uses.

Off-network Roaming: The primary use of your Device must be for domestic purposes within the Sprint-owned network. Domestic means use in the 50 United States and U.S. Territories (except Guam). Sprint reserves the right, without notice, to deny, terminate, modify, disconnect or suspend service if off-network usage in a month exceeds: (1) voice: 800 min. or a majority of minutes; or (2) data: 300 megabytes or a majority of kilobytes. The display on your device may not always be on and will not indicate whether you will incur roaming charges. You can monitor usage online through My Account. Roaming is not available with single-band phones, or to customers who reside or whose primary use is outside an area covered by the Nationwide Sprint Network. Sprint may limit or terminate service if you move outside of the Sprint owned-network.