I have a "retired" Galaxy S3 that I am keeping as a spare- The Kit Kat update supposedly has been available since 6/20, but I cannot get the software on my off-network phone to update- even though is is connected by wi-fi. I spent about a half hour chatting on-line with tech support Monday, 6/23, who assured me that is would update over wi-fe- although I have NOT been able to do so yet. I went into the Verizon store yesterday, and the woman I spoke to there told me all I had to do was swap SIM cards with my active phone, then casually mentioned that if I did that, it would void the warranty on my new phone by taking it off-network. Great, just what I would want to do...
I am seriously considering re-activating it for a couple hours, just to get it updated, then deactivating it again. It would seem there should be an easier way.