From what I have been reading(IM NOT POSITIVE) the beta releases of the phones have a day that they will be inactive and won't work. Secondly with switching the
sim card, on a free phone you won't be able to switch it over because the newer phones use a differnt chip. Meaning that a I90 chip will not work in a I730 phone, I have tried...when I did this my sister had to go out and pay 35 bucks for a newer chip to put into the I730. So im figureing that to use a I930 you need a I530 chip and up. Hope this helps a little bit more, the phone I don't have I got a I730

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