How to import your contacts to iPhone
You can send CSV file to the app either as e-mail attachment or via iTunes.
a) sending CSV file as e-mail attachment: your iPhone must be set up to receive your e-mails. Attach CSV file to e-mail and send it to yourself. Then open this e-mail on iPhone, find the attachment. Tough file name with your finger and hold (for a second or so). The menu will pop up with option “Open in “Contacts In”. Select it and app will start automatically.
b) sending file via iTunes: plug your iPhone to PC with USB cable. Click on your device. Select “Applications”. In the list of applications at the bottom find “Contacts In : Import CSV Contacts”. On the right side you will see table with files for this app. Press “Add” button and locate your CSV file.