LG -P768 User Manual page 280

Troubleshooting
Message Possible causes
Number not The Fixed dialling number
permitted function is on.
Impossible
to receive /
Memory full
send SMS &
picture
Files not
Unsupported file format
opening
SD card not FAT16, FAT32 file system
working supported
136
Possible corrective measures
Check the Settings menu and turn the function
off.
Delete some messages from the phone.
Check the file formats that can be supported.
Check SD card file system via card reader, or
format SD card using the phone.