Can I still exchange phones?

I recently upgraded two months before i would've and I got the Alltel Hue 2 upgraded from my LG ax8600. But I exchanged the Banter for it. I don't know why i did that. but is it possible to do another exchange for the banter again because the Hue is good but the battery ruins everything. I decided to get over the negative things about the banter but is it possible to do a second exchange?