I was using that plan, but I was finding that I didn't really have enough voice minutes (100 was less than I'd need). T-Mobile does throttle after 2GB on that plan, though that wasn't a big deal for me. The big problem for me was that T-Mobile's coverage area sucks; there were whole areas of Boston and Cambridge where I got absolutely no signal.
I recently moved to the $45 unlimited-everything plan on Straight Talk, which uses AT&T SIMs, and I'm pretty happy with it. (I don't know if they too throttle over 2GB, but I rarely hit it anyway.)
T-Mobile throttles after 5GB on that plan, not 2. Straight Talk straight up terminates your data connection after 2 GB. They claim that they throttle, but they effectively terminate it - the throttled connection is so slow and has so many packets dropped that I couldn't use a single app on my 'throttled' phone without it timing out and giving up.
I've read that elsewhere, but that doesn't match my experience in the New England area on TMO. I had my connection completely croak after my phone read 2GB of data usage. Maybe the behavior is different in different geographic areas?
(The last time I went over 2GB was a year ago on TMO when my home internet wasn't yet installed, so for me it's basically academic.)
Yeah, I've seen that. I don't really care, though - my real number is on Google Voice, so if I get tossed I'll just put my TMO SIM back in my phone. In the meantime, I get way better coverage.
I recently moved to the $45 unlimited-everything plan on Straight Talk, which uses AT&T SIMs, and I'm pretty happy with it. (I don't know if they too throttle over 2GB, but I rarely hit it anyway.)