If they are not supplied through your carrier then what would they do?
This whole question of unauthorised tethering is hotting up. The very latest from ZDNet News & Blogs;
I told you the tethering police were coming, and now they are here
"Today word is appearing that AT&T and Verizon have indeed taken the next step to curtail tethering by blocking the Wireless Tether app on handsets on those carriers. It would seem that the tethering police are indeed here as predicted."
The major mobile phone carriers are offering tethering services for about an additional $20/month. Circumventing these fees seems unlikely, as I've read that they can monitor their customers' bandwidth usage which increases when connected to another device. I've also read that they can monitor their customers' phones connecting to IP addresses.
In attempting to discover how to avoid these fees, my research has led me to some sites including tethering.com and tetheryourphone.com, which claim to enable tethering without requiring the customer to pay fees to the carriers. Instead, the customer would pay a 1-time fee for the software. Are these types of apps legitimate?