Originally Posted by
RichardInSF
It's weird that the service is slow since I believe T-mobile's Japan partner is NTT DoCoMO, which has the biggest network of all. Must be being intentionally throttled.
I've had T-Mobile monthly plan for three years now. I've used it all over Europe, Central America and Japan. Works great, but it is throttled to 3G, sometimes 2G, but not all the time. Sometimes LTE does work.
I've never figured out the pattern.