That is correct. My wife and I have separate accounts and have upgraded from the 3G to the 4, the 5, and now the 6 all without losing our unlimited data.Same. Curious to see how common it is. Apparently people with ATT still get upgrades and get to keep unlimited.
Perhaps people are in between upgrade cycles? Buy an iPhone 5S on contract, then buy a 6 off contract and sell your 5S. Buy a 6S on contract and sell your 6. Rinse, repeat.This is what I don't understand why people pay full retail?
If they choose to leave the the company they are with, they can pay the ETF and it will end up being full price anyway..
I can understand if they don't want to loose a big promo or unlimited data.