I am with Sprint and I purchased the Tetherberry app off Crackberry for a one time fee instead of paying monthly when I'm only going to tether occasionally. Not sure if Sprint even offers a separate tethering plan; they found a way from blocking those of us on their Everything Plans of tethering last month (which in their defense it does state right in the plan details that tethering is not included in the price but then they offer a free tethering software ).