I was able to finalize my orders for iPhone 6 16G last friday with Reference GTP27616470. However when I finished up my transaction the contract period was 6 Months but I chose 24 Months. I would ask if I have any cash out upon delivery of the unit. Can I still change the unit from 16G to 64G? Can you help me re this? I did not see the charge to bill option when I signed up so I opted for the COD. Please help me convert the Cash on Delivery to Charge to Bill, I have availed of the Plan 1700. The threads here show other people have the same problem. Please help us! Thank you!