I started a new billing cycle about 4 or 5 days after I upgraded to the SR from the Inspire and kept my unlimited data.
When I went to "Manage Features" in my online account it showed 6 different tiered LTE plans, but none of them were bubbled in. It did not show the unlimited plan that would be bubbled in.
When I went into managed features, and clicked on "View all included features" the first thing listed was:
"LTE UNL SMT THRL $30.00
LTE UNL SMT THRL"
When I clicked on "View Recent Usage" it shows, 272.23 of 10238976 used. According to the information that comes up when I scroll over the ? next to "Data" it says that I have the "10238976 MB data plan" and when I go over I will be given an additional 1 GB of data at a cost of "$null." Per the conversion scale, the 10238976 translates to 9,999 GB of data (10,238,976 MB/1,024 MB per GB).
That combination was odd enough that I had called AT&T about it and the girl I spoke with said that I definitely had unlimited data, and let me know that if I reached a certain data usage level (she said she thought it was around 2 GB) they could slow the data speeds down. She also stated that the usage levels were related to iPhone users and what were generally deemed high usage levels amongst iPhone users.
She then proceeded to tell me that she had never seen it before where it said __ of 10238976 used (or some other seemingly random number such as that). She said that that could be what they had determined would be the upper level after which my speeds could be reduced. I didn't point out that that was nearly 10,000 GB of data, but regardless, at the end of the day she confirmed that I did have unlimited data.
When I use *3282#, it says: "272.1 of unlimited"
All very odd to me, but as long as I have unlimited data, then I guess it is all right.