GSM_Error GSM_ReadRingtoneFile(char *FileName, GSM_Ringtone *ringtone);
GSM_Error GSM_SaveRingtoneFile(char *FileName, GSM_Ringtone *ringtone);
GSM_Error GSM_ReadRingtoneFile(char *FileName, GSM_Ringtone *ringtone);
GSM_Error GSM_SaveRingtoneFile(char *FileName, GSM_Ringtone *ringtone);