I jumped ship on 2 year contracts when I got my S5 last year.
I despise being locked into contracts with ETF's.
Next is emancipating.
Att is counting on most people not paying the phones off in full. And most people will be kept on installment plans. So it's a deterrent and definitely not emancipation since they don't anticipate people paying their installment plans off early.
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People forget (outside of California and Mass and maybe another state) we only pay sales taxes on contract price.
If I paid $399 for iPhone 6 plus 64gb in Florida. I would only pay $24-28 sales taxes (depending on the county sales taxes added to the 6% base rate).
But with ATT next. I will be paying $850 x 6-7% sales taxes.
That an added $30 cost in taxes.