I have similar problem. Through netbeans mobilty was successful to sign the the midle. But when i run my app on fone it says ert ot found on phone or sim. someone told me to transfer it via bluetooth..but i don see ny install cerificate option on phone!
For your information – I think it was discussed somewhere else, already – the same works on Nokia Series 80 2nd Edition like Nokia 9500, Nokia 9300 and Nokia 9300i, however, I get exactly the same permissions as with my Nokia 6680. Signing on these it totally useless except you use JSR-75.
I think we can close this thread, now. It only works for Nokia S60 and Series 80 2nd Edition phones and even there it is more a last testing in reality for those who want to go for 3rd party domain signing. In the Nokia S60 3rd Edition this „feature“ was removed and never worked on any Nokia Series 40.
Nevertheless, use this technique for other platforms in the Java Platform SDKs (emulators) before you go for signing. Please realise that MIDP signing might not cure all your problems.