I presume it's a normal 3G and not 3GS. If so I haven't noticed a huge speed 
improvement over 4.1, and all of the exciting features of 4.2 that I was 
looking forward to like airplay seem to only be for 3GS and above. So if your 
still on 3.x and have managed without folders for this long I wouldn't bother. 
If you have a 3GS then definitely go for it!

Sent from a tiny predictive keyboard

On 24 Nov 2010, at 09:55, Virginia <[email protected]> wrote:

> I didn't upgrade my iPhone 3.1.3  to OS4 because of warnings from Smuggers.  
> What is your advice about upgrading it to OS4.2.1? 
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