deploying a signed midlet in nokia 6131

I am trying to deploy a signed midlet in No开发者_运维问答kia 6131 over the air using VeriSign certificate but while installing I am getting message "No valid certificate". Do I need to sign the .jar file also?

VeriSign certificates don't need any special configuration on Nokia devices. Check your time/date settings, cause maybe the date of the device is set to default (probably 1st of Juanuary of some years ago) when the certificate was not valid yet, or more improbably, after the certificate expires.

Remember you've got to use a VeriSign Class 3 certificate. And well, you actually have to sign the JAR, and the signature is contained in the JAD.