I tried converting an NSF file with around 210 contacts, and what annoyed me was how every method looked fine until I checked the output. I started with CSV because most guides push that route. Big mistake. Phone numbers shifted, a few contacts lost alternate emails, and some entries looked half broken.

The worst part was the checking. I imported a test file into my phone and immediately saw missing details. After wasting hours, that’s when I realized the issue came from the conversion path itself.

I stopped forcing multiple steps and tried a direct NSF to VCF approach. I ended up using Gaintools NSF to VCF Converter after seeing it mentioned somewhere.

It handled the file properly and kept the fields intact. That finally saved me from fixing contacts one by one.