The alternative is to create tailored direct bridges between the home and roaming network ( Sprint and C Spire Wireless have done this to provide LTE roaming for C Spire customers), which is horribly inefficient and can be prohibitively expensive to do for all roaming partners. In order to efficiently enable LTE roaming, operators need to deploy support for IPX (IP Exchange) hubs that enable bridging LTE networks. Now, 4G networks are not yet available through roaming because most of T-Mobile's roaming partners do not have LTE roaming infrastructure in place yet. However, customers can manually enroll in the plan starting from today.

If extra speed is needed and available, the data pass can provide that access. T-Mobile customers will be automatically enrolled in Simple Global roaming on October 31. 128Kbps is likely all you would get in most of these destinations anyway, so the data passes are not needed as much. The hidden value of T-Mobile's roaming package is that the vast majority of Eastern European and African, Middle Eastern, and Asian destinations do not have broad 3G networks, let alone 4G networks. If customers want to have access to the highest speeds available on these networks, they can buy “International Data Roaming Passes.” T-Mobile's international data roaming passes come in three versions: As far as we know, latency should not be affected by the throttling. That means that T-Mobile customers will have access to 3G networks if they are available, but the bandwidth will be limited unless customers purchase high-speed data passes. When roaming in these countries, T-Mobile customers will get data throughput up to 128Kbps for free, regardless of the network technology. In these areas, T-Mobile customers on the Simple Choice plan have access to free data roaming and texting. These 115 destinations, separated by region, are: In these countries, T-Mobile customers no longer have to worry about excessive roaming bills and can truly afford to communicate while traveling the world. From now on, when T-Mobile customers that have the Simple Choice plan visit any of the 115 global destinations (countries and their territories) covered under “Simple Global Roaming,” T-Mobile customers can use basic data services for free and text for free.

Yesterday, T-Mobile's newest Uncarrier initiative went live, expanding the effective coverage for T-Mobile customers to over 100 countries worldwide.

C spire data pass purchase