If it was sleeping, it did work, but shut off it does not. I tried this last year on 4 models and you make the fifth.
It appears that the S3 alarm does not work when the device is off, although I tried several ways to fix it. I am sure I am skipping some important step in the alarm settings: I wouldn't believe the device lacks such important function which was available in all the many cells I owned so far. Can anybody explain, please?