IPhone 3G Unknown Error Occurred 6

iTunes error 9006 may appear when attempting to download, restore, or update an iPhone or iPad. Typically you'll see an iTunes error message that states something like "There was a problem downloading software for the iPhone. An unknown error occurred (9006)." Try the following tips to resolve error 9006 in iTunes if you encounter the error problem when updating iOS system software.

1. Insure that you have an active network connection and are connected to the internet
2. Quit out of iTunes
3. Update iTunes and also install any available software updates to Mac OS (or Windows, if applicable)
4. Reboot the computer (Mac or PC)

If above methods fail to help you out on the error 9006, get more solutions here: fix iTunes Error 9006 with 6 useful ways. Hope it be helpful for you.

You will probably have to reset your whole iPod, which WILL delete everything.

There are various reasons for this issue like below shows.

The problems to cause "Can't sync iphone to computer. Error (13019) occurred" can be various. You can refer to the following aspects to check and fix this issue.
1. Maybe your iTunes version is outdated and you need to update it to the latest version to ensure it to work normally.
2. Maybe there is something wrong with the USB cord you are using. You can change a new cable to have a try.
3. Maybe your computer system needs to update. You can check out your Windows system and access to new updates to handle this issue.
4. Maybe your iPhone system version needs to be updated. You can go to "General" tab on iPhone to check for iOS updating and follow the on-screen instructions to make it.
If you fail to settle "Can't sync iphone to computer. Error (13019) occurred" by trying the 4 methods shown above, you can continue to read the below instruction to help you to realize your goal.

Check: How to Fix iTunes Not Recognizing iPhone in Windows 10

There is a service that offeres repairs for the iPhone 2G, 3G and 3GSand provides a one year warranty on all new replacement parts. iPhone Repair NYC

Download the latest iTunes to your computer and reset the iPhone. Then re-sync it.
Reset

To reset iPhone, press and hold the Sleep/Wake button and the Home button at the same time for at least 10 seconds. During this time, a red "power off" slider may appear and the screen may go black, but do not release Sleep/Wake and Home buttons until the Apple logo appears.
If iPhone won't turn on, or the display freezes or doesn't respond

1. Press and hold the Home button for at least six seconds, until the application you were using quits.
2. If that doesn't work, turn iPhone off and turn it on again. Press and hold the Sleep/Wake button on top of iPhone for a few seconds until a red slider appears, and then slide the slider. Then press and hold the Sleep/Wake button until the Apple logo appears.
3. If that doesn't work, reset iPhone. Press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears

More resets:
Try This:
1. Remove Sim Card
2. Hold in 'Home' button and 'On/Off' button together until Apple logo appears
3. Replace Sim Card
4. Hold in 'Home' button and 'On/Off' button together until normal phone screen appears.


Also, Try this:
1.) Shut down the iPhone 3G.
2.) Start up iTunes
3.) Hold down HOME button on the iPhone 3G
4.) While keeping the HOME button depressed, plug in the Sync cable
5.) A message will pop up to ask if you want to reset.
6.) Just click YES and the reset process should start.

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

turn the iPhone off, connect the cable to the computer, but do not connect to the iphone. Hold the home button and connect the iPhone to the computer. iTunes will recognize it in recovery mode. (You must have ipsw file) Hold shift and click restore. now look for the ipsw file, choose that file, and itunes will do the rest.

try respring it (central + power buttons together and then connect to iTunes in safe mode,choose full restore (it will erase everything but if you have back up can be restored).

Where did you purchase your phone? however, you first need to update itunes to 8.0.2, that might solve your problem. Unless you have an unlocked phone then restoring your phone is useless because when you restore an iphone with itunes in the US without an att sim card it will actually lock the phone, but I do not think that is your issue. the two things you are seeing the connect to itunes and the emergency call system means that your phone is not properly activated. which is done by connecting it to itunes.

The only thing I can think, is that you got hold of a bad package cause my iphone edge did the same thing. When restoring make sure to let iTunes download the firmware so that you dont get an uncompatable version of firmware and get a head splitting head ache like i did, i downloaded the 3G firmware off the net only to relized almost three hours later that that version of the 3.0 firmware cant be loaded on the edge.

I just had this problem and it turned out to be... It didn't like my iPod cable. Switched to the iPhone cable and it worked.
Seems to be an iPhone 2.0 prob, or 3g prob, since I was using the iPod cable to sync my old iPhone just fine.