Use APKPure App
Get SMS Lock old version APK for Android
... 당신의 SMS가 잠금 귀하의 개인 정보를 저장
A new app for locking SMSs on your mobile with a password you choose, you can export chosen SMSs to an XML file on your mobile storage, then you can when you want import them again to the saved box. You will not loose your SMSs.
Languages supported: All languages that the device supports.