I'm assuming you are on a Mobile Share Plan. I still have unlimited data, therefore I do not get the $15/$25 a month discount. Apple is cheaper than AT&T Next for me.
Correct.
I rotate phones and switch eligibility between two lines.
I was one of the few that called ATT when Verizon started their Double your Data promotion several months ago. I had a 10gb plan, and ATT matched the Verizon offer giving me 20gb @ the 10gb rate. With mobile share rollover data and WiFi everywhere, I usually start with about 25-30gb(which comes to 5-10gb added to my account monthly) of data a month. No idea the quantity of data you use, but unlimited would be nice.
It's funny how in the cellular industry we used to pay per minute just to talk on the phone. Now it's pretty much unlimited free for all without prime hours of 7am-7pm. In the meantime data went from unlimited to price per block of GBs. Go figure.