I'm a long term ATT customer. I use appx 17gb data per month and pay for 3 phones. Yesterday's snail mail brought a promotion from T-Mo for unlimited talk + text + data for 4 phones for 100 dollars per month. Total. Since that would save me substantial cash monthly I proceeded to read the fine print. The catch here is quite plain. Only the first gb of data is high speed. So the other 14 gb that I use will be unlimited but throttled. I wonder how throttled? Anyone out there with any insight?