Hi,This morning I wanted to call, so I took my phone ( Iphone 4 S) ,but my All contacts list was empty! I checked in my computer ( windows 8) I have them in Iclould. How can I bring back my data?

Hello Noushin,

It sounds like you are unable to see your contacts in the phone, but have confirmed they are still at http://www.icloud.com. I would next try these troubleshooting steps from the article named:

iCloud: Troubleshooting iCloud Contacts

http://support.apple.com/kb/ts3998

• If you're using iOS 7, quit and restart the Contacts app on your iOS device:
  1. Press the Home button twice to see preview screens of the apps you have open.
  2. Find the Contacts preview screen and swipe it up and out of preview to quit the application.
  3. Tap the Home button to return to your Home screen.
  4. Wait a minute before reopening the Contacts app.
• Turn iCloud Contacts off and back on:
  1. Tap Settings > iCloud.
  2. Turn Contacts off. Choose to delete data only if your data exists at icloud.com/contacts and on one or more of your devices. Otherwise, choose Keep Data.
  3. Wait a few minutes before turning Contacts back on.
• Restart your iOS device by holding down the Sleep/Wake button and then swiping the screen when prompted to power off. Then turn your device back on. This may sound simple, but it does reinitialize your network and application settings and can frequently resolve issues.

Thank you for using Apple Support Communities.

Regards,

Sterling

You're Very welcome!