In the US, both Verizon and AT&T have begun to identify subscribers who violate their Terms of Service (TOS) by using unauthorized tethering applications on mobile networks. Citing these violations, users are being migrated away from their current, often unlimited data plans, and being enrolled in premium plans that permit tethering.
These recent actions aren’t the first attempts by carriers to manage the usage of tethering applications. This past May, US-based carriers demanded that Google restrict access to applications that allow tethering in the Android Marketplace. This restriction brought Google devices in line with Apple and Microsoft, who both don’t allow third-party tethering applications in their official app stores.

