several devices on itunes

Hi group, I have a question about iphones and backing up with itunes. I already have a iphone 4s and ipad 2 backed up on my imac using itunes. I just purchased a new iphone 4 for my wife. I want to back that up on my imac as well. When I open itunes it sees the 4s and ipad using wifi. It does not see the iphone 4. I plugged the iphone 4 into a usb port and itunes saw the 4s and 4 but no ipad. I did back up the 4 while it was pluged in. When I unplugged the 4 itunes went back to seeing the 4s and ipad. Is itunes only capable od seeing two devices?

thanx, nod

?? Never had a reason to plug more than 1 in at a time.

Let me say up front I ain't no genius :Blushing: Normally I just back up my devices over wifi. I assume it works as good as plugging it in. I dunno....

nod

I've had more than two iDevices plugged in at once, so the answer to your question is "no, there's not a limit of two." Unless you mean wireless? If so, I would imagine that there IS a limit to the number of devices you can see wirelessly at one time due to bandwidth issues.