It used to be easy to hack tethering—root your device and install a third-party or modded tethering app. But snuck in amongst the changes in Android 4.3, a new data-monitoring service of sorts made its debut. There used to be a time when your data connection was yours. You paid for it, so you were free to use it for whatever you wanted. Unfortunately, those days are long gone.
Now, when you have your phone's data connection tethered to another device to provide it with internet service, a tag is sent upstream that labels this traffic as "tethering".
This means that your carrier knows when... more