I had both google contacts and manually entered contacts on my S2, i didn't enter any contacts on the loaner phone. But there are the call logs and text messages tho. When I put my SIM card into that phone, nothing showed up on the phones contacts list, but i thought maybe i had to do something to transfer them and that's why there were none in there. So that most likely means the SIM card didn't store them? But really, what would they do with my contacts anyway huh? call them and tell them they have my phone and then hang up? hahahaha that's about all they could do really, i guess i'm just being paranoid, altho there's no reason to be... or IS there?
(hahaha i'm just being facetious!)