restore messages from PC to iphone

You cannot sync messages, however, you can restore an iTunes or iCloud backup. Note that this will overwrite everything on the phone with the contents of the backup.

When you back up the phone to iTunes or iCloud all data on the phone is backed up, including messages. All of the data goes into the backup database. This does not include music or apps, because they can be synced, but does include your address book, photos, texts, notes, email etc. (see: iTunes: About iOS backups). When you restore the backup all of this information is restored. It is important NOT to sync, however, because syncing will overwrite the old backup. You said you were told NOT to do a Backup Restore. But that's the only way to get your content and your messages back.

It just occured to me that you need to update iOS first. If that's the case do it this way:

• Before connecting the phone Go to iTunes Preferences on your computer, Devices tab, and check the box to not automatically sync.
• Connect the phone and DO NOT SYNC.
• Click the Restore iPhone button.
• When that finishes you should be asked if you want to set up as New or restore a backup. Choose Restore Backup.

This should restore all of your data.

IF you have been backing up regularly you will get back your messages as of the date of the last backup.