I have to migrate contacts from an old Nokia phone Excel backup to iPhone.

[patrickmyser]

The easiest and safest method is to Convert Excel to vCard because iPhones accept VCF format directly. Use Softaken Excel to vCard Converter to process the Nokia Excel backup and Export Excel Contacts to vCard with all details intact—name, number, email, address, and more. Once converted, you can import the VCF into iCloud and sync your contacts to the iPhone. It also supports Batch Excel to vCard Conversion, so even if you have a large contact list, the migration remains simple. Try their free demo to convert a sample file and verify that everything appears correctly on iPhone.