Long Distance Calling and Roaming Features
T-Mobile has some great options if you need to make international calls or if you plan on visiting Canada or Mexico while you're using their Travel SIM card.
Stateside International Talk
$10 - $15 USD
Get unlimited calling to landlines in 70+ countries from the U.S., Mexico, and Canada for just $10 per month/per line. Once you've activated your SIM card this Add-on can be order calling T-Mobile directly.
Mobile Without Borders
Get 4G LTE data and unlimited calling when you're in Canada, or Mexico. Once you've activated your SIM card this Add-on can be order calling T-Mobile directly.