How to Restore Contact from CSV file to iPhone? Step
1: Backup all your contacts from iPhone to computer as .csv file format using Tansee iPhone Transfer Contact.
Step 2: Click on Start - All Programs - Accessories, click
to open Address Book.
In Address Book, click File - Import - Other
Address Book..., select "Text File (Comma Separated Values)",
click Import, then browser the CSV file,
click Next, Map the fields you wish to import, click finish.
After all this, you had import the contacts to your Windows
Step 3: Open iTunes, connect iPhone, click to select the
iPhone on iTunes, choose Info tab, in Contact section, check
"Sync contacts with Window Address Book", click apply.