syncing issue

[Anglican-Mac]

I tried turning on the manual managing of music on my iphone. However, iTunes tells me that my phone is synced with another itunes library (which it can't be, since it synced not ten minutes before this happened, and has never been synced with any other computer) and tells me that activating this feature will wipe the phone. I'm ok with the itunes content being wiped, but will this wipe all my contacts and text messages as well?

 

[X2thaP]

As far as I remember, I switched it on recently for an iPod, it gives you the message but doesn't actually wipe the contents.

But if it does, you could always restore from your latest backup and have your messages and contacts back, no?
That's the point of a backup, to restore the previous state in case something goes wrong.