Currently Being ModeratedDec 29, 2012 9:15 AM (in response to edo_LT)
Syncing to an empty address book will erase your contacts on the phone, especially if you connect to a new computer. You'll have to restore your phone from a backup from the time before you switched the PC.
More info mentioned in this user tip here:
Currently Being ModeratedDec 29, 2012 9:46 AM (in response to Ingo2711)
Thanks. I still have access to my old computer with the older backup.
What should I do?
If I connect my iPhone to my old computer, it will sync and all my contacts will disappear also on old laptop?
What are the steps to avoid this?
And what should I do afterwards to avoid loosing my contacts again after connecting to my new computer?
Currently Being ModeratedDec 29, 2012 9:59 AM (in response to edo_LT)
Contact info is part of the backup, see if you can replace the backup folder on your new computer.
The location of the backup folder is mentioned here:
The folder where your backup data are stored varies depending on the computer's operating system. Make sure the backup folder is included in your periodic data-backup routine.
iTunes places the backup files in the following places:
- Mac: ~/Library/Application Support/MobileSync/Backup/
- Windows XP: \Documents and Settings\(username)\Application Data\Apple Computer\MobileSync\Backup\
Note: To quickly access the Application Data folder, click Start, and choose Run. Type %appdata% and clickOK.
- Windows Vista and Windows 7: \Users\(username)\AppData\Roaming\Apple Computer\MobileSync\Backup\
Note: To quickly access the AppData folder, click Start. In the search bar, type %appdata% and press theReturn key.
copied from iTunes: About iOS backups
You could try to copy that whole folder to your new computer and replace the existing one. After that check if the backup shows up in iTunes/Edit/Preferences/Devices. If yes, use it to restore from and all your info should be back on your phone.
For information about how to create and restore from a backup, see iOS: How to back up.