I gave up a grandfathered unlimited AT&T plan to take my phone number to T-Mobile, because I'd rather have unlimited* (with the asterisk) data that I can use ab

I gave up a grandfathered unlimited AT&T plan to take my phone number to T-Mobile, because I'd rather have unlimited* (with the asterisk) data that I can use abroad as well. Unlimited AT&T isn't worth the occasional, accidental $200 charge for checking the news in El Salvador or wherever. There are caveats even for the grandfathered folks.