Re: Digital Signature for MIDlet?

Actually, that step matters, but one thing you have to be careful about is that with most of the recent cell phones, the phone firmware is customized for the carrier to explicitly reject any application not signed with the carrier's certificates. I've done extensive research with vanilla phones purchased from T-Mobile (in the US), Sprint and Cingular and in every case my MIDlet (signed with a Thawte certificate that was purportedly installed in the phone already) failed the security check while installing. This failure occured regardless of how the MIDlet was signed or whether or not the phone was unlocked. However, when I went out and bought an unbranded handset ($200 from the Nokia store in NYC: no carrier-specific settings of any kind) and my MIDlet installs smoothly, grants me all the requested permissions and in general does all the wonderful things promised by the J2ME spec. You might be running up against this limitation, so before you decide your code signing technique is broken, you might want to look at getting a completely stock firmware phone and testing your MIDlet on that.
[Message sent by forum member 'blackbuddha' (blackbuddha)]

http://forums.java.net/jive/thread.jspa?messageID=229769

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