Will I be charged extra if I use personal hotspot on my iphone 4s? (T-mobile)?

I have unlimited data. I've looked online, but can't find a definite answer. If I will be charged extra, will I be charged a certain amount per day/week?

No. Every new data plan on T-Mobile has at least some mobile hotspot included in the plan. If you use it all up, you will be routed back to the myT-Mobile home page and it will alert you that you need to add more mobile hotspot data. Obviously if you add more mobile hotspot data, it will cost more. But there are no overages. T-Mobile recently announced that there are no more overages at all for any customers ever.

http://www.t-mobile.com/...idual.html