IPhone syncing music to laptop problem?

I have music that I downloaded awhile ago on my iPhone and I have different music on my laptop. Is it possible to sync my iPhone to my iTunes and be able to have both the music from my laptop and phone synced onto each device? I don't want to lose the music on my phone.

Setting up syncing
Before setting up syncing you should download and install the latest version of iTunes. Wi-Fi syncing requires iTunes 10.5 or later and iOS 5 or later. You can change your sync options at any time. Each time you sync, content is synced between your iOS device and computer to reflect new, updated, or deleted content.

USB syncing
Open iTunes.
Connect the iOS device to your computer using the included USB cable
Click the Device button in the upper right corner.

  • Syncing Problem to iphone 5? Okay, so on my computer, i have about 1000 songs. After i sync to my iPhone 5, it says i only have about 900. Why is this? Also, songs that i put on my computer from a cd won't play for some reason.
  • Problem with syncing iphone 3? My friend gave me this iPhone 3. Its an O2 one, so my 02 sim card is fine with it.however, I've installed iTunes on my computer, but the phone is still locked. I get the same message from iTunes saying there's an unknown problem with iTunes (0x80090318) what can I do?
  • Problem with syncing iPad and iPhone? I have had my iPad for a while and have synced it to iTunes before and all of the apps for my iPad are in there. Now I have an iPhone and want to sync it to iTunes to be able to charge it with my MacBook, but I don't want to mix my apps, how do I fix this where my iPad and iPhone apps aren't mixing?
  • Problem with itunes syncing music? When i try to put music on my iphone it will start syncing 100s of songs i never chose so i "prevented devices from syncing automattically" then it wouldn't sync when i plugged in but then i would drag one song over then all of a sudden i'm syncing 108 songs… Why does this happen and how can i fix it