Transfering 3gs data to new 4s using iTunes 11.3.1
Hi, I really need help with this problem. Firstly I'm using imac with the latest iTunes (11.3.1), i've been using my iphone 3gs for few years now & I recently juz got an iphone 4s. When I got my 4s as usual I needed to set up my phone but without plugging it into my imac, I recovered some datas from my old 3gs using icloud as I signed in. Sadly I only recovered my contacts & reminders.
So now, I'm kinda confuse when I tried to use iTunes for backup ,adding musics etc.. (with my 4s plugged into my imac of coz) I really HATE the new iTunes, I've got 2 options.....
1.Set up as new iPhone or
2.Restore from this backup (my previous iphone3gs backup description shows "unknown")
My question is if I "set up as new", will my current data in my 4s be erased? & if I "restore" will my current data be overwritten?? Please HELP ME.... I'm really lost & confused.