Hi Guys, I have an iPhone 6s Plus with Verizon with 24-month installment agreement. I would like to upgrade to iPhone 7 plus. I was going to pay off the 6s plus (around 380/400$), sell it and get the new 7 in installments Checking the apple website, it looks like the only option there is for Verizon is 2yrs agreement for $419.. Why is that? Can I buy with monthly plan ONLY on Verizon.com? I always bought my iphones on apple.com Also, is there a better way to upgrade considering that I upgrade every year and I don't want to switch Verizon? Thanks guys!