Install Nokia PC suit into your computer (if not previously installed)
Synchronise data between nokia phone and nokia PC suit.
Go to the contacts icon
Click on the File at the top menu
Click 'export' button
Show a folder in your computer to export the .vcf file

Open your Microsoft Outlook programme
Go to File
Click 'Import and Export'
Select 'Import a VCARD file (.vcf)'
Click 'next'
Pick the .vcf file to import

Once import is done all contacts have come to your Outlook programme
Now you can export all contacts as .csv file for this
Go to File
Click 'Import and Export'
Select 'export to a file'
Click 'next'
Select 'Comma Separated Values (DOS)'
Click 'next'
Select 'contacts'
Click 'next'
Browse a destination folder for exporting and give a suitable name for the .csv file

Now you can import these data into your hotmail account
Open your hotmail email account
Go to contacts
From 'Add people to contact list' select 'Import from file'
Select .csv file you exported before

Now you can import those contacts into your iphone
Go to settings in your iphone
Select 'Mail, Contacts, Calendars'
Select 'Add account'
Select 'Hotmail'
Insert your email address and password.
That's done.