problem of Syncing Iphone 4 with Ical and IOS 7: ICal infos are transferred to Iphone, but Iphone Infos are not, why?

Hey there PCLR76,

It sounds like the syncing is only working 1 way, from the computer to the phone but not from the phone to the computer. I want to recommend first, restart both the phone and the computer and then try again.

iOS: Turning off and on (restarting) and resetting

http://support.apple.com/kb/ht1430

If the issue persists, I would next try resetting your Sync Services with this article:

Mac OS X: Resetting the SyncServices folder

http://support.apple.com/kb/TS1627

OS X Mountain Lion

1. In the Finder, choose Utilities from the Go menu.
2. Open Terminal.
3. In the Terminal window, type or paste the following command on a single line:
   /System/Library/Frameworks/SyncServices.framework/Versions/A/Resources/resetsync .pl full
4. Press Return.
5. Quit Terminal after the operation has completed (when Terminal returns to the command prompt with a $).

OS X Lion and Mac OS X v10.6 Snow Leopard

1. If you see the Sync menu in the menu bar, skip to step 3:
2. If you do not see the Sync menu in your menu bar, skip to step 7.
3. Hold the Option key on your keyboard, then click the Sync menu in the menu bar:
   if you see the Sync menu but you are unable to open it, skip to step 8.
4. Choose Reset Sync Services.
5. Click Reset Sync History.
6. Test for the original issue. If the issue persists, or if you are unable to open the Sync menu, follow these steps:
7. In the Finder, choose Utilities from the Go menu.
8. Open Terminal.
9. In the Terminal window, type or paste the following command on a single line:
   /System/Library/Frameworks/SyncServices.framework/Versions/A/Resources/resetsync .pl full
10. Press Return.
11. Quit Terminal after the operation has completed (when Terminal returns to the command prompt with a $).

The next thing to try would be in this article named:

Sync Services: Advanced troubleshooting for contact and calendar syncing

http://support.apple.com/kb/ts2481

Thank you for using Apple Support Communities.

Take care,

Sterling