My apologies if this has been asked before, but I am wondering if this is possible. I have been eligible for an upgrade since november, but I was planning on waiting until june for the 4th gen, iPhone. My question is, since I have an $120 gift card to best buy, if i could buy the iphone as my upgrade there with my gift card. Is it possible for best buy to access my account in that way, or are they only certified to open new accounts? Thanks in advance for any responses.