How to log into op.fi with Mobile key: 1. Select Log in. 2. Select Mobile key as authentication method. 3. Enter your username and select Continue. 4. On your phone or tablet, open OP-mobile or OP Business mobile. 5. If the confirmation request didn't open automatically, tap Confirm with Mobile key. 6. Check the confirmation request details. 7. Confirm by typing your Mobile key PIN. 8. Login succeeded. 9. Do your transactions on op.fi. How to log into op.fi with Mobile key: 1. Select Log in. 2. Select Mobile key as authentication method. 3. Enter your username and select Continue. 4. On your phone or tablet, open OP-mobile or OP Business mobile. 5. If the confirmation request didn't open automatically, tap Confirm with Mobile key. 6. Check the confirmation request details. 7. Confirm by typing your Mobile key PIN. 8. Login succeeded. 9. Do your transactions on op.fi.