movistar TSM 1 Reference Manual page 31

Enable/disable auto save outgoing message
1. Select menu "Auto Save"
2. Select "Auto Save/Do Not Save" to enable/disable atuo save outgoing
message.
Set Call Back Number
If you enable Callback number,every message you sent will postfix the number
you set here and the receiver will know which number to callback when he read the
message.
1. Select menu "Callback".
2. Select "Edit" to enter Callback number, then press "Ok" key.
3. Select "On" to enable Callback number.
4. Select "Off" to disable Callback number.
Set Send Time
If you set Send Time, message will be deferred sent according to the time you set
here,but this function need operator's support.
1. Select menu "Send Time".
Sequoia Reference Guide
Chapter 3 Messages
3-5