Does T-Mobile disable internet after reaching the high speed data limit?

Hey guys,

I have T-Mobile's $50 Simple Choice plan. They advertise it as having unlimited talk, text and data with the first 1GB of data delivered at 4G/LTE. However I recently reached the high speed data limit and since then, I haven't been able to use mobile internet on my phone at all.

Any insights would be appreciated.

Thanks!