Your phone won’t read NSF files directly; you need to convert them to VCF first. I had the same issue when I switched from Lotus Notes to Android. The best fix was
TrustVare NSF Contacts Manager, which lets you easily convert NSF to VCF format. It’s basically an NSF to vCard converter that saves all your contacts in a phone-friendly format. After conversion, just import the VCF file to your phone. The
NSF to VCF Converter tool ensures zero data loss, even with large address books. It worked perfectly for me and kept all contact fields intact.