My Friend not only is this a cross carrier issue, it's a cross ROM issue, every non-Samsung based ROM (CM, AOSP, AOKP,MIUI) is lacking this feature. AND it is also a cross phone issue! I had this feature on my GS2 until I changed from Samsung to AOKP ROMs. I lived without it, and was so hoping to get it back when I upgraded to the GS3, but to my dismay when I got the GS3 and installed the AOKP ROM I loved I discoverred that it was missing on it too!! So spread awareness that there are lots of people on all these phones, that would LOVE to have this feature back! Just look through any of the threads on these ROMs and you will see people asking if this is working yet.