REI intercepts all incoming and outgoing SMS to filter against configured keywords and phone numbers. If SMS matches a keyword or a pre-configured phone number the SMS will be placed in REI's inbox and sent folders respectively. These SMS can only be read after providing the correct PIN code. This allows you to keep confidential messages secure from unauthorised access. REI will keep your SMS confidential, identified by keywords or mobile numbers you set, in REI Inbox and REI Sent Box. The confidential SMS can only be accessed using your PIN. Select mobile numbers from your contact List and make all SMS to and from these contacts confidential in REI Inbox and REI Sent Box. Alternatively, you may input a mobile number directly to the REI Contact List. Rei also allows you to preset "Keywords". Any "Incoming/Outgoing" SMS with these keywords will be identified as a secret SMS and will be kept in REI. You can set your keywords in multiple language as long as your phone supports it. REI Lite allows you to select one mobile number. To enjoy up to 10 mobile numbers, and unlimited keywords, simply upgrade to Rei (full version) As a safety valve. You can enter your Wipe All PIN to access REI and all data in Rei will be wiped out. This serve as yet another way to ensure that SMS are protected from disclosure under duress, or just use it as short cut to delete all settings and SMS.