Re: Paying for more tethering
Check out T-Mobile's Smartphone Mobile Hotspot FAQ's:
For devices on the $70/month unlimited plan, your tethering data will stop until the next billing cycle begins.
Does Smartphone Mobile Hotspot experience data-speed reduction? Or does it shut off (capped) once I reach allotment of high-speed data?
All new data features with limited high-speed data buckets (500MB, 2.5GB, 4.5GB, 6.5GB, 8.5GB, 10.5GB, 12.5GB) will have their tethering (and device) speeds reduced when the high-speed allowance is reached. The Unlimited data feature works a little differently. For Unlimited data features, because tethering is added separately via the Smartphone Mobile Hotspot add-on features, tethering is tracked separately. Once you reach the tethering allocation on your SMHS add-on feature, tethering will stop (be capped) until the beginning of the next bill cycle.