I have 2 questions. 1. What's the difference between factory unlocked and unlocked by the carrier? Fyi, mine was unlocked by AT&T. When you buy unlocked new, do you have to indicate GSM or CDMA, etc. When do the unlocked models typically come out? 2. I want to buy the 6, not the plus. I'd like to know if the following makes sense financially... I have a 5 month old unlocked 5s, 64gb. I want the 128gb 6. I haven't seen any prices yet for unlocked but I'm guessing it'll go for about $1000. Going by eBay completed listings, I can get $400 to $500 for my 5s. Assuming I got $400, does it pay to get a factory unlocked version? The subsidized price of what I want is $400. So, assuming all my numbers are more or less correct, it would cost me an additional $200 to buy unlocked rather than a subsidized model. If I don't buy unlocked, in all likelihood I will keep my 5s rather than selling it. I travel internationally and would use it for that purpose. Thanks!