I just upgraded my iphone to 3.0 it's not syncing my new itunes? it's my first time downloading and purchasing.....it says to authorize my computer and i've done a dozen times and it's still not working.it's also not uploading my apps.

If you'a an iPhone user, you can use iTunes to transfer music from iPhone to computer first. You may have well known that iTunes only transfers purchased items from iPhone to iTunes library, so iPhone users can move purchased songs from iPhone to iTunes library.

1. Run iTunes and click "Edit > Preferences > Device > Prevent iPhones, iPods and iPads from syncing automatically" at the upper left corner of iTunes window.
2. Plug iPhone into computer via the USB cable, and then click "File > Device > Transfer Purchases" at the upper left corner.
3. iTunes will start to sync all the purchased items back to its library.

After the syncing process, you will get the music files in your iTunes library, including the purchased music files. You are able to find the music files in the folder of your iTunes media files on your computer.

The next step is really easy. Since the music you want is already saved on your computer, you can now simply connect your MP3 player, drag and drop to transfer songs.

On the contrary, here's also a guide about Three Ways to Transfer MP3 Files to iPhone in case you need help.

You can choose iTunes to sync iPad with your Mac, but you should be careful when you are using iTunes to sync iPad. iTunes is not simply backup or transfer software, and it doesn't allow you to transfer non-purchases. So you only have authority to sync purchased items, including apps, music, movies and so on to your Mac or iTunes library. Check out the following steps.

1. Authorize your new computer to use your Apple ID. Install iTunes on your new computer and then Authorize it in the Store tab.This is the email address you use to sign into iTunes (and probably anything else Apple-related). If you don't know it offhand, you can just check the computer you're currently syncing with. If you go into the iTunes Store it should appear in the upper-right corner. Once you know it, go to the new computer you want to sync with and locate the Store menu. From there, choose "Authorize This Computer". (In the event you've switched Apple IDs and made purchases with more than one, you'll need to perform this authorization for every account.)
2. Back Up Your iPhone. Just in case anything goes wrong when you are syncing, back up your iPhone, so that if all else fails, you'll be able to restore it to the way it is right now. To do this, connect your iPhone to your computer with its USB cable and open iTunes, Click "File > Device > Back up".
3. Transfer Purchases from your iPhone. Now you'll want to transfer all of your iTunes purchases (including free apps, paid apps, songs, books and movies) from your iPhone to your new computer. To do this, right-click (CTRL-click on a Mac) your iPhone within iTunes and choose Transfer Purchases. Or click "File > Devices > Transfer Purchases from my iPhone". Then iTunes will start syncing the purchased items to the library.

http://www.leawo.org/tutorial/how-to-sync-iphone-to-new-computer.html

If you are using iTunes, point to your iPhone, when connected. In the Device section, from the Music tab, make sure that "Sync Music" and "Entire music library" are both connected. Also, go to Apps tab and see if your computer is, indeed, authorized.
And there is a tutorial about sync iPhone music to computer easily, please try to refer it.

Hope it helps.

Sign into your iTunes account on the new computer. Go to your account on the iTunes store and you can re-download your purchases and authorize your new machine.

here are useful tips for your iphone set up.


Please read the Activating and Setting Up Manual Instructions below -
What You Need - To use iPhone, you need:
• A new wireless service plan with the carrier that provides iPhone service in your area
• A Mac or a PC with a USB 2.0 port and one of the following operating systems:
• Mac OS X version10.4.10 or later
• Windows XP Home or Professional with Service Pack 2 or later
• Windows Vista Home Premium, Business, Enterprise, or Ultimate edition
• Display resolution on your computer set to 1024 x 768 or higher
• iTunes 7.5 or later, available at www.apple.com/itunes
• An iTunes Store account (a major credit card is required to open a new account) â An Internet connection
Activating iPhone
Before you can use any of iPhone's features, you must activate iPhone by signing up for a service plan with the iPhone service carrier in your area and registering iPhone with the network. If you already have a wireless account with the carrier, you may be able to upgrade your account to work with iPhone, or keep using your old phone and add a new line for iPhone. (Some accounts may not be upgradeable.) You may also be able to transfer your current phone number to iPhone, or get a new one.
For more information about iPhone, including videos about how to activate and use it, go to:www.apple.com/iphone
Inserting the iPhone SIM Card
In some regions, you may need to purchase the SIM card separately and insert it into iPhone before activation. Read the documentation that comes with the SIM card for instructions.
If your carrier gave you a PIN number to use with your SIM, you may need to enter the PIN before activating iPhone.
Activate iPhone
1 Download and install the latest version of iTunes from www.apple.com/itunes.
2 Connect iPhone to a USB 2.0 port on your Mac or PC using the dock and cable that
came with iPhone. Unless your keyboard has a high-powered USB 2.0 port, you must connect iPhone to a USB 2.0 port on your computer.
3 Follow the onscreen instructions in iTunes to activate iPhone and sync iPhone with
your contacts, calendars, email accounts, and bookmarks on your computer. A single checkmark in "Set Up Your iPhone" syncs all these items automatically. Or you can use iTunes to customize the information you sync, and to sync your ringtones, music, photos, podcasts, and videos to iPhone. See the following section.
You can disconnect iPhone from your computer after "Waiting for activation" appears on the iPhone screen. When activation is complete, "iPhone is activated" appears on the iPhone screen. This means that iPhone is fully functional and you can use all of its features.
Important: If you are migrating your current phone number to iPhone, activation may take from several hours to a day and migration of your number may take several days, depending on your location and previous carrier.
Syncing iPhone with Your Computer
When you connect iPhone to your computer, iTunes syncs iPhone with the information and media on your computer, according to how you've configured the iPhone sync settings in iTunes.
You can set iTunes to sync any or all of the following:
• Contacts - names, phone numbers, addresses, email addresses, and so on
• Calendars - appointments and events
• Email account settings
• Webpage bookmarks
• Ringtones
• Music and audiobooks
• Photos
• Podcasts
• Videos
Ringtones, music, audiobooks, podcasts, and video content are synced from your iTunes library. If you don't already have content in iTunes, the iTunes Store (available in some countries) makes it easy to purchase or subscribe to content and download it to iTunes. You can also add music to your iTunes library from your CDs. To learn about iTunes and the iTunes Store, open iTunes and choose Help > iTunes Help.
Contacts, calendars, webpage bookmarks, and photos are synced from applications on your computer, as described below. Contacts and calendars are synced both ways between your computer and iPhone. New entries or changes you make on iPhone are synced to your computer, and vice versa. Webpage bookmarks are also synced both ways.
Email account settings are only synced from your computer's email application to iPhone. This allows you to customize your email accounts on iPhone without affecting email account settings on your computer.

when you sync the iPhone with the computer, iTunes will only add what is new, it will not delete your apps.

Setting Up Syncing You use iTunes on your computer to set up which items are synced. Make sure you have the most recent version of iTunes (On a PC, open iTunes and choose Help > Check for Updates. On a Mac, open iTunes and choose iTunes > Check for Updates.
Step 1: Connect iPhone or iPod touch

1. Connect iPhone or iPod touch to your computer using the included cable. You can connect the cable from your computer directly to iPhone or iPod touch, or connect the cable from your computer to the Apple Universal Dock (available separately) and put iPhone or iPod touch in the dock. By default, iTunes opens automatically.
2. Select iPhone or iPod touch in iTunes under Devices on the left hand side and click the Info tab.

Step 2: Set Up Which Items Are Synced Click the respective tabs in iTunes to specify which media and information you want synced from your computer to iPhone or iPod touch.
For more information about syncing iPhone with your computer see the iPhone User's Guide:
On your computer: click here to download and view "Chapter 1: Getting Started" in iPhone User Guide.
On iPhone: Tap Safari and view http://help.apple.com/iphone/guide/.
For more information about syncing iPod touch with your computer:
On your computer, click here to download and view "Chapter 1: Getting Started" in iPod touch User Guide.
On iPod touch: Tap Safari and view http://help.apple.com/ipodtouch/guide/.

Step 3: Sync iPhone or iPod touch Click Apply in the lower-right corner of the screen. Your computer syncs with iPhone or iPod touch according to your settings.
The first time you sync iPhone or iPod touch, you are asked if you want to merge data, replace data on the service, or replace the data on your computer. After that, anytime you connect iPhone or iPod touch to your computer, iTunes opens and syncs with iPhone or iPod touch according to your settings.
You can adjust sync settings anytime iPhone or iPod touch is connected to your computer. You can only connect and sync with one iPhone or iPod touch at the same time. If you need to sync more than one iPhone or iPod touch, disconnect one before connecting the other.
Note: Syncing won't delete any contact in Yahoo! Address Book that contains a Messenger ID, even if you've deleted the contact from your address book on iPhone or your computer. To delete a contact containing a Messenger ID, log in to your Yahoo! account online and delete the contact using Yahoo! Address Book.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe


I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

WHEN YOUR IPHONE IS CONNECTED TO YOUR MAC/PC UNDER DEVICES YOU WILL SEE YOUR PHONE THEN GOT TO RINGTONE TAB AND SELECT SYNC LL RINGTONES REMEMBER THAT YOU CAN ONL DOWNLOAD PURCHASED RINGTONES TO YOUR IPHONE.
FOR ANY MORE SUPPORT GO TO APPLE.COM/SUPPORT 
THANK YOU APPLE GENIUS BAR