In past, whenever I wrote any post for symbian OS mobiles, I recieved many comments/mails saying that SIS files I referred cannot be installed. The problem was many of them was unsigned. While few people turn-off certificate (signed) verification, rest either don’t know how to do it or need a signed version for some reason.
First how to turn-off sign checking…
Go into menu > tools > settings > applications > app.manager. Turn software installation to all and online certificate check to off.
This may vary little depending on your handset model. But the process is similar. This will allow you to use any app that hasn’t been digitally signed.
Next how to get a symbian app signed online…
There is an Open Signed program, currently in beta, which do signing job for symbian application. Its free but have few limitation and also note the restrictions before using the service.
The service is quite simple to use. Just enter your handsets IMEI number, email address, and upload the unsigned SIS file. You will get it signed.
Thanks Manish for sharing this via a comment.
Link: Open Signed