Also the bills are time stamped at the start of the call. So if data calls are billed the same way that is why people shutting their phone off at night aren't getting the middle of the night charge. That's when the phone reestablishes it's data connection if it is turned on.
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You own the physical DVD. You can use it as a frisbee or a coaster or maybe even put it in a computer. But you only have a license for use of the code. Courts have repeatedly enforced this. Best you can get is your money back for the package if you don't agree to the terms.
You let your users have admin privs? And they don't know enough not to enter their password at any prompt?
Like the iPhone OS?
And what does the keyboard do with the data? It still needs a compromised system to relay it anywhere useful. Or you need to have repeated physical access to the keyboard.
Comparing two locations in Hawaii for temperature doesn't give you much. Those two locations are in different climate zones. It can pour rain for a week on one part of Oahu without a drop falling on another. In Hawaii weather is extremely dependent on location. Your assumption that they actually have the same temperature is just plain wrong.
Your behavior just hi-lights the fact that you don't understand the economics. A portion of that monthly service payment to the carrier either goes to pay off the cost of the phone subsidy or directly to the carriers profit line. At the very least get one of the free phones with it to keep as a back-up. If you don't want it then donate it to charity. But I'm sure the AT&T stockholders appreciate your contribution to their dividend checks.