When put the wrong password, until password is locked. You can unlock it if you remember the old password. No need to call the call center. You can do it by yourself via K PLUS. It's easy with your ID card number.
1.
Log in to K PLUS, tap “forgot your PIN”
2.
To unlock PIN, press “OK”
3.
Select “Unlock”
4.
Enter your ID no. / passport no.
5.
PIN unlock is successful. You can enter with your old PIN.