I have downloaded CDs and music from my sister's iTunes account, but I don't know how to get it to show up on my Iphone?
Sync it to your Iphone From Itunes
Sync your iPhone to iTunes.
The only music that showed up on my phone were the ones that I purchased...
How would I sync it?
Plug Your Iphone Up to your computer then enter your sister account on computer then sync it to your phone
Hook up the cable from your computer running iTunes and connect it to your phone. It will probably sync automatically, but if it doesn't just reading through the menus you should figure it out. It's very easy.
Just try what I said because that should work
Its been plugged into the laptop, the only icons I see are "music, movies, books, etc" and itunes store....thanks anyways.
reset computer And then plug Iphone in
Did you put these songs into your itunes library yet?
syncing with itunes http://support.apple.com/kb/HT1386
On the device:
Settings > iTunes & App Store > Apple ID > Sign Out > Sign In with you sisters Apple ID
Do the results change?
Retrieving data ...