Solved.
Use solution post 1 and/or solution post 2.

Hey.

I have my N9 equipped with ubiboot and stock kernel as well as OpenMode kernel (; also nitdroid and nemo of course).
When I try to configure my SIP account under OpenMode, I always get a 'cannot connect to SIP'. So no chance.
When I configure the same account under stock kernel it works flawlessly. As well as I may place and receive calls.
Trying to connect to this account under OpenMode fails again.

I have no idea what is going on
Anyone out there?

(I have already asked in ubiboot thread, but maybe asking whole community will reveal some more info...)

--edit
it has nothing to do with aegis store and/or account passwords
neither it has to do with my VoIP providers

BUT it seems like loading the OpenMode kernel as 2nd stage kernel (kexec) causes this strange behaviour (to be verified) ...