Well carriers try to get every penny they can from you....I don't know about the s3 as mine is not in active service....but on most phones tethering needs to be bought from a carrier unless you root the device
Sent from my ATT Samsung Galaxy SIII using TapaTalk
If i helped hit the thanks button.
Current Device: Samsung Galaxy SIII (SGH-I747)
ROM: Stock Touchwiz Rom
Kernel: Stock 3.0.31-2024954
Previous Devices: Motorola Droid 1, Pantech Crossover, Motorola Droid X, LG Revolution, Sony Ericsson Xperia Play (r800x)