Originally Posted by hl0m4n
i don't think the 4s will support t-mobile hspa+...
UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz) <-- no hspa+
GSM/EDGE (850, 900, 1800, 1900 MHz)
It has it, 99.999% sure, dont know why apple stopped listing it, as they used to before the iPhone 5 came out
check out this article, it was written shortly after the 4S was released.