Doesn't sound fun, does it?
Decrypted: A Guide to Avoiding Data Throttling
Throttling is a term that has snuck up on laypeople all of a sudden, particularly applying to how mobile data is delivered. Rather than just cutting users off altogether once a certain usage level is reached, carriers far and wide are instead putting a chokehold on the speed at which data is delivered. In other words, those who consume too much lightning-fast LTE data may find their emails loading much slower until the next billing cycle. That’s better than no data at all, but it’s a very poor user experience that you’d be wise to avoid.