When you order your next phone you will have to pay full price for it, don't forget the SG III you are planning to sell "which you bought at a subsidized price" still belongs to Verizon for 2 years "until it is payed off", reason for them locking you in for another two years is so they can recoup the additional $350 for the original price of the phone, someone has to pay Samsung for the device, so by them giving you a break so you can upgrade to a brand spanking new device at a fraction of said devices full retail cost, they lock you in so said device will be paid off in full, THEY are making the payments for YOU at a 2 year rate, of course it is coming out of your account, it's just so you don't have to pay the full price up front, but after two years the phone is payed for BY YOU, and then is yours TO DO WHATEVER YOU WANT WITH IT, so you can continue on a month to month basis, unless you buy another subsidized phone, you again will be locked in for two more years " so you can pay for the phones full price at a two year rate, it's like a loan, a two year loan".
Reason Verizon locks people in for two years is so they can recoup the money's for the phone that was sold to you INITIALLY at a subsidized price, someone has to pay for the phone, at it sure is not going to be Verizon, that is why if you BUY a phone at fully price, Verizon does not care if they lock you in for another two years, because the phone is payed for, no risks for them, another reason they bang you for that $350 early termination fee "the termination fee goes down the longer you have the phone", so in case you decide to leave, they still get the money so they can pay off the phone to whom ever vendor they purchased it from. Samsung, LG, HTC, Sony are not in the charity business.
And in regards to your SIM question, I believe the new LTE Sim is build into the chipset, that is the way that Qualcomm will be going with the S4 chipset, it uses less power this way.
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