The ones who already own a Galaxy S3 don't need to do anything and just continue using it.
However, the ones who need to purchase one NOW, should stay away from S3. Inflated prices and 1GB (limited) RAM are very disappointing factors for it. If you have to get a phone NOW, get a Nexus 4 instead.
A Set+Charger in local market for 16GB these days, can be bought for <38k. (Expect a little more price drop soon as soon as the new comers i.e. S4 & ONE will hit the market -- Point is, right now is not a good time to spend any cash. Wait atleast till the end of this month)
If you have to purchase now, then get the 16GB version atleast.