A:AnswerYes. It's a feature that SONY is very proud of, although I think it is a superfluous trick that really adds nothing of value to the phone....only makes it cost more.
A:AnswerYou cannot upgrade for this device since this is Unlocked - but if you have a Bestbuy credit card or Amazon credit card, they offer 12-month financing & sometimes 24-Months (only on offer days). So you can pay for the full-price with 0% interest in 24 months which is almost as same as getting in a Contract with a carrier / company.
A:AnswerYes there is a restocking fee if it has been taken out the box and used. I'm elite so I would have 30 days to return. It's 14 days for non-elite members.