Yes I did but the fact is all the phone's functions are "unlimited" via the microcell. the phone does not know you are on a "micro Cell" since to the phone it's just a "Tower". So though you are almost correct on using the phone as a "hot Spot" on a microcell.. there are cases where you might need to do it.
Case one: No wifi on your internet account
Case 2: Cellular frequencies and Wi-Fi have different "penetration" factors and thus different ranges.. I do not know which penetrates farther but if you can "See" the microcell but not the Wi-Fi signal .. Well.. The phone can act as a Wi-Fi "extender".
However I suspect that would be rare.