A couple of years ago, T-Mobile announced Mobile Without Borders feature, which allows T-Mobile customers to roam to Canada or Mexico with full 4G LTE speeds and without roaming fees. The new feature was part of Magentas Un-Carrier Amped campaign which beat one-upped AT&Ts announcement at the time to make roaming in Mexico free.
Anyway, the feature has had enough time to mature and for T-Mobile to figure out the cost-effectiveness of the feature and what the actual usage has been. According to T-Mobile, less than 1% of those who travel to Mexico and Canada use less than 5GB of roaming data per month.
As a result starting on November 12, T-Mobile is enforcing a data soft cap to 5GB per month. Once 5GB are reached, the customer will be throttled back to the default internet speeds when traveling abroad in most countries: 2G (128Kbps) speeds, or 3G (256Kbps) speeds if you have T-Mobile ONE Plus.
The change may be disappointing for those data-hungry travelers or those who travel constantly for business, but it is one that T-Mobile is placing in order to prevent usage beyond the intent of the product.
The change applies to all customers, even if you still have a legacy plan. For example, if you are still on the 10GB Simple Choice plan and have used 2GB before entering Mexico or Canada, youll have 5GB of high-speed data to use in Mexico/Canada and the remaining 3GB of data can be used when you get back to the States.
Even though the new data limit is in place, you can still call and text while traveling at no additional charge.
Source | Via