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# Syncing your contacts and calendars

After you’ve added your devices to iSync, you can sync the contact and calendar information on your computer and devices.

You should sync each device with only one computer. If you sync your devices with more than one computer, you could see duplicated or incorrect information.

## To sync your contacts and calendars:

1. If this is the first time you’ve synced a device on this computer, click the device’s icon to see its sync settings, and choose “Erase data on device then sync” from the “For first sync” pop-up menu.

   The first time you sync devices, it’s a good idea to replace the information on them with the information on your computer so that each device starts with the same information. If, however, you have some information that’s stored only on the device, you can choose to merge the information on your device and computer. If you merge for your first sync, you may see what look like duplicate pieces of information. In fact, those items probably have subtle differences.

   For your second and subsequent syncs, the information is always merged, so that any changes you make on your computer and on your device are updated in both places.

2. Select the types of information you want to synchronize in each device’s sync settings (to see a device’s sync settings, click its icon).

3. When you’re ready to sync, click the Sync Devices button in the top-right corner of the iSync window.

4. If you’re syncing a Symbian OS phone, check your phone for messages asking if it’s OK to communicate with your computer and reply “yes.”

   To avoid having to reply to authorization messages from the phone before each sync, you can authorize your computer to communicate with your phone in your phone’s Bluetooth settings. For more information, see the instructions that came with your phone.

If one or more devices that you’ve added to iSync are not present, iSync saves your changes and updates the missing devices the next time the devices are present.