Customers of major US carrier T-Mobile can enjoy most of the normal features of their plan while abroad in a range of countries, but T-Mobile is stepping things up for the 2018 Winter Olympic Games in South Korea with free unlimited 4G LTE data and calling for all customers who go to see the Games. T-Mobile customers on postpaid plans who happen to be roaming in South Korea will have unlimited high-speed 4G LTE data from the opening on February 7 all the way to the closing ceremony for the Paralympics on March 20. Customers will not have to do anything special to activate the benefit, and there will be no extra charge for all of this. As a caveat, deprioritization rules still apply just like they do at home, and the network is almost certain to be crowded. This means that those wanting to keep speeds up should be careful of their data usage, and not run over the 50GB threshold.
T-Mobile took a bit of time in its press release to highlight its advantages over other carriers when it comes to international travel. The post pointed out that Verizon customers have to go through a special process to enable the international roaming plan, and then pay extra to use their plan abroad, with the main method of this being $10 per day passes. This will get customers 500MB of high-speed data per day. AT&T's approach is similar, but a bit less complicated and with fewer options. Not signing up for a plan and simply using your phone abroad on either of those carriers will incur hefty roaming fees. According to T-Mobile's press release, normal smartphone use while abroad could cost an AT&T customer around $3,000 per week, as an example.
Though this event and T-Mobile's special provisions for it are exceptional, the normal international roaming plan is pretty generous; customers can use their devices and plans almost the same as they can at home, with the only real caveat being that data speeds are capped at 128Kbps, or 256Kbps if you pay for the $10 addon. Mexico and Canada, on the other hand, have up to 5GB of LTE data per bill cycle before speeds go down.