TetherMe for iOS8+ cydia tweak enables the native tethering functionality of your device and gives you the option to share data from a VPN or to share a WiFi connection to USB.
This DOES enable the instant hotspot functionality introduced with handoff in iOS 8.1.
TetherMe also allows you to edit your APN settings.
There is no App installed, settings are available under TetherMe in Settings.
This method should work on every carrier without any additional user interaction; however, if you decide to tether without your carrier’s knowledge and they find out, we will not assume responsibility for any additional charges or fees incurred.