T-mobile's Partner Roaming Policy
I found a T-mobile Partner Roaming policy effective for all service renewed or activated after June 28, 2008. This may not apply to everyone (Pre-June 2008 plans), but it's better than the guessing we have done on T-mobile's partner roaming. This should apply to new "Even More" plans too.
10. * Roaming, International Calling & Mobile Content. Roaming. Your Device may connect to another provider’s network (“off-net”) even when you are within the T-Mobile coverage area. Check your T-Mobile Device to determine if you are off-net. There may be extra charges (including long distance, tolls, data usage, failed messages or calls) and higher rates for off-net usage, depending on your Rate Plan. Your primary use of your Device must be within the T-Mobile owned network coverage area and we may limit or terminate your Service if you move outside of this area. We may limit or terminate your Service without prior notice if more than 50% of your voice and/or data usage is off-net for any three billing cycles within any 12 month period
. International Roaming & Dialing. International roaming and dialing is available with some Rate Plans and on some Devices and may require an additional feature on your account. Whether roaming internationally or making and sending international calls and messages while in the U.S. (or Puerto Rico), you will be charged international rates (including for voicemails left for you and for data usage). Different rates apply in different countries. See www.t-mobile.com
for information on international access, rates, Services and coverage. Mobile Content. Wireless devices can be used to purchase goods, content and services (including subscription plans) such as ring tones, graphics, games and alerts from T-Mobile or other companies. You are responsible for all Charges associated with such purchases from any Device assigned to your account. Some Charges may appear on your bill (including Charges on behalf of other companies). You may be able to restrict access and certain services by implementing controls available at www.t-mobile.com
, or by calling T-Mobile. Mobile content may not be transferable from one Device to another Device.
Section 17 d.
17. Our Rights to Limit or End Service or the Agreement. WE MAY LIMIT, SUSPEND OR TERMINATE YOUR SERVICE OR AGREEMENT WITHOUT NOTICE FOR ANY REASON, INCLUDING, WITHOUT LIMITATION, if you, any user of your Device, or any user on your account: (a) breaches the Agreement; (b) incurs Charges greater than any billing or credit limitation on your account (even if we haven't yet billed the Charges); (c) provides inaccurate information or credit information we can't verify; (d) lives in an area where we don’t provide Service or more than 50% of your voice and/or data usage is off-net for any three billing cycles within any 12 month period (see Section 10); (e) transfer(s) Service to another person without our consent; (f) becomes insolvent, goes bankrupt or threatens bankruptcy (except as prohibited by law); (g) misuses your Service or Device as described in Section 16, above; (h) uses your Service or Device in a manner that is excessive, unusually burdensome, or unprofitable to us; or (i) are on a Rate Plan that we determine is no longer available to you. We may impose credit, usage or other limits to your Service, suspend your Service, or block certain types of calls, messages or sessions (such as international, 900 or 976 calls), in our sole discretion and without notice. This paragraph constitutes notice to Puerto Rico customers that your Service may be suspended or cancelled if you engage in any of the foregoing actions in Sections 16 and 17, including but not limited to failing to pay your bill when due, in accordance with the Puerto Rico Suspension Regulation 5940 of March 12, 1999, promulgated by the Telecommunications Board where applicable, or in T-Mobile’s sole discretion. If your Service or account is suspended or terminated and then reinstated, you may be charged a reactivation fee.
So, if you use a lot of partner service, be sure to use "even more" :D native network service during you billing cycle to avoid the possibility of termination.