I've been struggling with this for a long time. We have an application that starts on phone boot. (This is for older 2nd edition phones, specifically, 6630, 6680 and N70.) The auto-start function works perfectly well on most handsets, but there is a small number, on which the application does not start. I can see the launcher starting up but then the main app doesn't start at all. On average, I find about 1 device out of 50 or so would have this problem. Thinking this may be a firmware issue, we even tried re-flashing these with generic Nokia firmware - but the problem is still present.
The application is for our internal company needs and is running on the company's handsets, which we buy second-hand from various sources.
Any ideas and suggestions will be greatly appreciated!