Currently Being ModeratedDec 10, 2012 8:33 AM (in response to Phillipwj)
No. Most newer apps will not run on 4.2.1. The 3G was discontinued 2.5 years ago. If you didn't save copies of the old versions of the apps, then I'm afraid you're out of luck.
Currently Being ModeratedDec 10, 2012 8:44 AM (in response to KiltedTim)
Thanks for reply. But how could I have saved the apps for the iphone 3G? I know of no way to keep a seperate section of apps which are backward compatible. There was never any option within iTunes that I noticed anyway.
Currently Being ModeratedDec 29, 2012 4:37 PM (in response to Phillipwj)
The apps are stored in /Users/You/Music/Mobile Applications/
and if you have someones ios 4.2.1 compatibles please let me know. In my case, itunes update them automatically with versions non compatibles with ios 4.2.1. Then i erase the good versions from my iphone without notice the itunes update.
Now we know apple products are only for 3 years?
Currently Being ModeratedDec 30, 2012 7:09 AM (in response to Phillipwj)
Well I figured out that one way to handle this situation was to set up a new User account in Mac OSX with a clean empty iTunes to sync JUST with this iphone 3G. This means I know exactly where all my ios4 compliant apps are and no mix up between ios4 (my iphone 3G), ios5 (my rapidly obsolete iPad 1!) and ios6 (my iphone 4).
I dont keep any content on the backup phone, its just apps, so its not too onerous. I guess I could also sync it with my main iTunes account seperately for music/content etc.
Currently Being ModeratedDec 30, 2012 7:13 AM (in response to lacasuela)
Correct. Some apps do seem to have previous versions saved, most dont. Ive been through all the apps and manually added the ones I wanted back. This had about a 35% succcess rate Id say, better than nothing, but clearly, some sort of option in iTunes to save final versions for any given ios version would be a very nice tool to have.