Question If I return to factory settings will the unlocked status be lost?

[AudioBoy]

Nokia Lumia 520 does not read SIM card. WOndering of restoring factory settings will help. DOn't want to loose unlocked setting

 

[hang-the-9]

It's not likely a factory restore will fix this, if it can't read the card it's a lot more likely the card or the card slot is bad.