LG P700 User Manual page 288

Troubleshooting
Message
Number not
permitted
Impossible to
receive / send
SMS & picture
Files not
opening
SD card not
working
124
Possible causes
The Fixed dialling number
function is on.
Memory full
Unsupported file format
FAT16, FAT32 file system
supported
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.