Best Bet for Trading in New Unopened iPad Mini 2 WiFi+Cellular
I'm not sure if anyone else might be in the same boat, but AT&T offered me a free iPad Mini 2 (WiFi+Cell) for $50 when buying my iPhone 6S. Since I only have an original iPad Mini (WiFi only) I took advantage. Problem is, I would much prefer something with either bigger storage (this one from AT&T is only 16GB) and even one of the newer ones, either the remaining iPad Mini 3 in stock or the new iPad Mini 4.
AT&T won't let me simply pay the difference to upgrade, as I only paid $50 for it but it still sells retail for $399. Does anyone have any advice on my best bet for getting top dollar to get a bigger or better device. The price difference between the 16GB iPad Mini 2 and iPad Mini 4 is only $130, but AT&T wants me to pay $479.
I'm not trying to scam anyone or do anything dishonest, but seems like AT&T could've given an upgrade option.
Any thoughts would be greatly appreciated!