Dynamically enables native tethering or personal hotspot for iOS3.X or newer devices. This should work on any carrier without the need for customized bundles or preferences.
TetherMe also bypasses signature checking and allows you to edit your carrier bundle manually if you so desire. This is required to enable MMS functionality on T-Mobile. TetherMe does NOT enable the loading of APN configurations from .mobileconfig profiles at this time.
TetherMe allows you to enable tethering on your iPhone even if your carrier requires a specific plan or provision that often costs more. For instance if you have unlimited data with AT&T and want to tether, you can simply install this tweak and turn on Personal Hotspot under Settings.
You can purchase TetherMe from Cydia Store for $4.99.