I have developed one application for personal use and also bought COMODO Code Signing certificate to sign the same. After signing the app when I try to run it on Phone it says 'Certificate not on phone or SIM'. I have updated my phone to latest firmware also. I have no idea why its happening. I don't know whether I have some mistake in signing or there is some other mistake. I need to sign my Midlet just because it asks for permission every time I access Memory Card.