Hi all. I'm asturcon3, developer of some (few) published apps, currently working on ThOR, a after-google-reader client (the old reader, innoreader, bazqux, feedly coming...)
http://store.ovi.com/content/382129I'm facing some issues building an upgrade way for 2014 and after. Currently my app retrieves a json file from my server including the up to date version number that it checks agains its own version number. If the updated version number is higher, the app offers the link to download the sis file. No problem here, it's working.
Now, for the sis file itself and the damn signing thing. Unsigned files can only be installed on hacked phones. Self signed files must have UID's in the unprotected range, so no actual possibility of upgrading an existing and protected app. Symbian signed is also closing. Developer cert's are only for very limited set of IMEIs.
I can't see other viable paths.
How are you facing this? I need some enlightenment. Please.