Smartphones, being fairly expensive these days (especially for us Windows Phone users), are required to be looked after for the two year duration of our contracts (should we be tied to one) until we can get that special free/discounted upgrade and receive another device from a carrier.
Although stability through even the most heaviest of usage is pretty good and handsets seem to last a good for years for some, it's when users begin to dive into the OS and hardware configuration that problems begin to appear. For WP7, this was most apparent with the Chevronwp7.updater situation which left a large number of devices not able to receive official updates from Microsoft.
We've always noted with our homebrew and unlocking coverage that to perform any action or carry out any process that's not officially supported by the big names could leave you stumped with a unusable device at any point. Enter into the room: enabling tethering on your WP7 device.
We've been made aware of some users over at the XDA Developers forum reporting that their devices have become unable to connect to Zune when plugged in and not even a hard reset can correct the issue. No solution has been found and users are left with no alternative but return to their local store and get a replacement device or further help with firmware etc.
While the functionality may be worth it should this hack work successfully, the problems that can arise when something goes wrong can be pretty devastating. Take a look at the thread (linked below) and some of the posts by users. Should you continue to use unofficial hacks and whatnot, always be sure to double check steps, sources and reliability to prevent this happening to you too.