BenQ Z2 - Manual (Page 79)

Using Your Phone 63
• Delete all
Used to delete all messages in the Inbox.
If a message is saved in the SIM card (marked by --unread
or --read), you can move and copy the message or all
messages saved in the SIM card to phone memory.
Managing the Outbox
The Outbox preserves a backup copy of messages that you failed to
send.
To manage messages stored in the Outbox, go to Messages >
SMS >
Out box .
Managing Sent Items
To manage sent messages, go to Messages > SMS > Sent. The Sent
folder preserve messages that you sent successfully.
Managing Message Drafts
You can go to Messages > SMS > Drafts to use the message drafts
that you have saved.
Managing the Private Folder
Go to Messages > SMS > Private Folder. You must enter your
phone code to access the Private Folder (the default phone code is
1234).