Delete old messages Checkmark this setting to allow the phone to delete older messages in a thread when the Text message limit or Multimedia message limit is reached. Remove the checkmark to keep all of your messages.
Text message limit Touch to set the number of text messages to save per thread.
Multimedia message limit Touch to set the number of multimedia messages to save per thread.
Signature Opens a dialog box to enter a signature to automatically send with your messages. Checkmark appears after a signature is entered.
Callback number Opens a dialog box to view or edit the callback number sent with your messages. Checkmark appears after the dialog box is closed.