Tmobile USA also raised their "unlimited" data by a 33%!! Per line. So instead of $20/unlimited option. It's now $30 extra per line for unlimited data. That's a huge price increase in such a short amount of time.
It's for NEW customers. Old customers Unlimited LTE will stay at the same price (+$20).
We all know Unlimited LTE can't go on forever. For new customers,
1GB: $0
3GB: +$10
5GB: +$20
Unlimited LTE: +$30
If you want to use 50GB LTE a month, you have to pay for it.