Samsung M520 Owner's Manual page 90

Deleting Old Messages
You can delete messages that you've already read whenever you like, or
you can have your phone delete them automatically for you when your
phone's message memory becomes full.
To automatically delete read messages:
1.
Select Menu > Messaging > Settings > General >
Auto-Erase.
2.
Select Yes or No and press
3.
Select Return (
Adding a Customized Signature
Each message you send can have a customized signature to reflect
your personality.
To add a customized signature to each sent message:
1.
Select Menu > Messaging > Settings > Text Message > Edit
Signature.
2.
Select On and press
to your outgoing messages, select Off and press
3.
Enter your signature using the keypad and when you're finished,
press
(See "Entering Text" on page 45.)
64 Section 2B: Controlling Your Phone's Settings
If the Inbox becomes full and the Auto-Delete option is enabled
(Yes), unlocked messages are deleted starting with the oldest.
If the Inbox becomes full and the Auto-Delete option is not
enabled (No), no further messages can be received until some
of the stored messages have been deleted.
or select Done (
.
).
. (If you do not wish to attach a signature
).
.