I didnt want to go create an account on the Apple support forums to post this..and I figured someoen here will get it pretty easily. I have an iphone 5 with all my music currently on it. My iphone 3gs is sitting on a shelf at home, unused. Because all my peripherals have the old adapter, I'd like to use my old iphone as an ipod. The questions I have is: if I sync it to iTunes, will iTunes try to make it my primary device and change all the syncing settings I have set up for my iphone 5? If I am wrong on this, how can I make sure that all I do is update the tracks on my old iphone? Clearly there's a way for a person to have an iphone and an ipod in use with the same iTunes account...but I have not been able to sort out how.
In short, yes it will try to add songs in your library your old phone doesn't have. It will also tried to add contacts, apps, and things like that to the old phone that it doesn't have as well. You have to do a manual sync and select which things you want transferred. It will not make the 3gs your primary device though.
Is there a way to classify the old phone and new phone with differnt sync settings, or will I have to click and unclick the boxes on different tabs each time, depending on the device I am syncing? I dont mind if it add all the new songs and album art...I just don't want it to sync everything. I might even do a full restore of the old phone before I get started.
your computer/iTunes will recognize them as two different devices. When you set up the sync settings (what songs sync, if contacts/calendar/email sync) will stay the same and you won't have to reset them each time you go to update your phone.