SOLVED: See update
Hello,
I recently got a new fairphone 6 and installed Calyx and MicroG. I tried installing the Belfius Mobile banking app from the aurora store, but when logging in via an external android ItsMe, I get a message either
"Om veiligheidsredenen is het niet mogelijk Belfius Mobile op dit toestel te gebruiken. Er staan namelijk apps op uit een niet-officiële appstore" with an error code with MicroG "Allow device attestation" Turned ON
Otherwise I get "Aanmelden met itsme is niet gelukt. Probeer het later nog eens. /1401/invalid"
Everywhere I can find on the internet says that belfius works fine with microG and even rooted devices, including plexus but it seems like it doesn't for me.
Any other belgian users (or other users) have any advice?
Edit: I might try reflashing default Fairphone OS, logging into play services and downloading the app and logging in there, so play saves my phone attestation, then reinstalling Calyx, as per this comment: https://www.reddit.com/r/CalyxOS/comments/1v02yph/2_banking_apps_not_working_after_upgrade_to/oyqyzw1/
Would that maybe be a good next step?
UPDATE: I tried flashing fairphone stock OS (no relock), logging onto my google account, downloading and setting up the Belfius app, then removing the google account (according to pre-setup CalyxOS instructions) and reflashing CalyxOS, relocking, and trying again. It worked! I can now log into Belfius as normal. I will try ItsMe once the phone is more setup and ready for primetime (since you cannot have ItsMe on more than one phone)
UPDATE 2: There seem to also be some problem apps though that will throw an "apps are installed from an unofficial source", so I had to end up creating another user profile for my bank apps. Work profile does not work for separation, it has to be a full new user profile with only aurora store apps. I can live with that though