Anyone use the mobile Internet plan abroad? Is it also slower speeds? Assuming yes.
Officially it's limited to 2G, but it really depends where you're gonna be.
Some cities you'll barely get Edge while other places will be at least 3G.
I'm on a half-world trip now using my iPhone 6 on T-Mobile, I've had internet almost everywhere I've been so far but some places just barely enough to load a map, no chance of even getting directions. Even location services failed to load in some places.
For example in Goa, India it was Edge (or less if that's possible) but up in Mumbai there was nice 3G speeds.
Bigger cities have better coverage so you'll get better connection. Smaller cities will be less. Mountainous ranges hardly anything.
I'm currently in Prague and have actual T-Mobile 3G service (in the Palladium mall here there's even a T-mobile store).