1. Confirm the correct network security key
2. Check to make sure the security key you’re entering is correct
3. Make sure the case of the letters are correct
4. Change the security key to a memorable phrase
5. Avoid copying and pasting the security key

To resolve a network security key mismatch, make sure to confirm the correct key, check that you’re entering it correctly, and use a memorable phrase. Avoid copying and pasting the security key.