the iphone could not be updated!!

Since you have so many post already almost with similar issue, you're next step is to

If you still need help, try these steps

If you can update your device but it starts up in recovery mode, follow the steps above again. On step 4, choose Restore instead of Update. After the restore completes, you need to set up your device from a backup.

If you still see an error during the update:

1. Check for updates to your Mac or PC. If you restart your computer for an update, check for updates again after you restart.
2. Try to restore your device using another USB cable.
3. Try to restore your device on another computer.

If you continue to see error 9, 4005, 4013, or 4014 when you try to restore your iPhone, iPad, or iPod touch, contact us.

Learn about other update and restore errors.

click here If you see error 9, 4005, 4013, or 4014 when you restore your iOS device - Apple Support

What version of iTunes is on the computer? As noted in your previous post, you need at least iTunes 12.8.

iphone update - Apple Community

Is this the same iPhone 6 where you were trying to install iOS 9?

Is this the same phone that noted you need an updated version of iTunes? If so, did you update iTunes?