How to take my conatacts and all my other data from my old iphone and put it into my new one?

I already have setup my new iphone and have been using it for a few weeks my question is can i still take my data from my old iphone and put it on to my new one. I also already gave my old phone back.

I'm not an iPhone expert but on Android Google backs up your contacts, app data, settings, etc. There may be something similar available for iPhone. I suggest you look into Google.

The info from the old phone should've been backed up in your local iTunes on PC/laptop or maybe you did an iCloud backup. Without the original phone that's the only two real options. See this. Best luck.
http://support.apple.com/.../kb/HT2109