Same situation as you, i called their hotline 211 and I ask for change of Phone model. They confirmed to answer my request in 24 hrs, but informed me that if approved the availability will be delayed at least 4 days. it is just fine with me.
I would also be fine with that. I would rather wait a little to get the 6 Plus than get the 6 and regret it later. Also, can anyone explain to me the charge-to-bill option for 24 months? I got kind of confused plus the reset fee since I still have 12 months left in my contract. Any enlightenment is much appreciated.
that's the pay-off or pretermination fee if you are still within the lock-up period and you avail/upgrade to iPhone 6 for example. generally this is the computation:
Pre-termination Fee =
Handset Base Price [HBP] - Cashout
Total Holding Period
x Remaining Holding Period
the charge to bill option would be depending on customers' account history and profile. i believe this was only a promo and for customers who preregister last month, October.
hope that helps.