Security Plugin must be installed to prevent the Vault app from being terminated by task killer apps. Please install NQ Vault first (https://play.google.com/store/apps/details?id=com.netqin.ps) before installing Security Plugin.
NQ Vault keeps your personal photos, videos, contacts, messages, call logs, apps private.
Feel free to contact NQ customer service at [email protected]
if you have any questions or concerns.