The only time I get the transcript not available are "hangup" calls (e.g. the caller didn't leave a message) And most of those, when I looked up the caller id were known telemarketers. I sent them to my GV Spam so if they call again, they get the "This number not in service" message. (the other time is when friends just didn't want to leave a message and either emailed, or called again later)