Send your security code to a trusted person
Want to protect your phone, but afraid you may forget your security code? Define a trusted person, and if you forget your security code, you can send the code to that trusted person.
Define your trusted person
Select 
and Security > Device lock > Trusted person > Select trusted person , and select the desired contact.
If the phone number of your trusted person changes, you need to change it manually.
Recover the code
After entering the incorrect security code, select Recover, and follow the displayed instructions.