I usually get an automatic upgrade and have been using the Echeckin feature with no real problems. I usually use my ff number for checking in but it's been noted that this sometimes causes a problem. If you use your ff number and have problems, try again by using the record locator or the confirmation number. The one time I had a problem, I used the record locator and was able to continue. Unfortunately, I do think if you've been "selected" for one of the random checks, you probably won't be able to use the Echeckin feature.