Good luck with your S3. The one thing that is certain for me other than death is that I would NEVER AGAIN by a Samsung smartphone. I did and still do have an S2 bough about 1 year ago. I figured, if I like it I can skit the 4S and if not give it to my wife. How exactly does a top of the like phone from the largest manufacturer get this bad is beyond me. I got the noise cancellation problem (and if you don't know what that is you really need to look it up before buying a Samsung) the phone is entire built from plastic and is very easy to drop yet the plastic is quite cheap so scratches on the shell are very easy to make. Oh and most of all, almost a year after Android 4 being release, I still have no way to easily upgrading to it. Samsung supposedly has released their version yet my carrier still has to *approve it* before I can get it.
And we haven't even gotten to the design of the Samsung Android modifications. You think S3 will get a better support? Guess again! I will bet money on the fact that despite all the talk from Google about limiting the extent of manufacturer modifications to Android and the supposed 18 month update support, S3 will get stuck on Android 4 for as long as most of the upcoming users own their S3 phones.
Oh and FYI the S2 is not updated to 4.0.3 via the *public* Samsung roms and I fully understand why my carrier wants to test this before letting it out. I have never seen a phone software that crashes this much and I do remember the early smartphone days.
Also, if you are hoping to keep your unlimited data plan with Verizon LTE, you should check the fine print again as I believe Verizon will make you sign a new contract but I might be wrong ...