I have a weird problem, hope you can help. I suspect it’s a problem specific to the phone manufacturer, because I don’t have this problem with a different phone model under the same circumstances:
Scenario: GMX account, Thunderbird w/ CardBook entension and phones, address books and calendar should be synced automatically.
The phone shows more contacts than actually in the address book.
To be more specifci: I modify/merge contacts in GMX online or in Thunderbird (sync between those works fine), the changed contact show up in the phone, but sometimes is doubled, and the contacts are not deleted so I end up with multiple contacts.
The phone’s address book app shows contacts which are not in the GMX address book (anymore), I tried this with the contact app which came with the phone as well as the “Google Contacts” app.
Before Sync (there are already 2 copies of same contract for some reason)
After changing the contact in GMX and manually triggering sync in Davdroid: (I added an “A” to the contact’s first name to demonstrate the issue)
The contacts app shows only the DavDroid contacts:
I read and followed the FAQ as well as the installation guide.
App is excluded from battery saving.
Phone-wide account auto sync is on.
App has all access rights. I did not find a setting for “autostart” as described in the vendor-specific FAQ.
Model: Moto G4 Plus, Android 7.0
More technical data:
P.S. I’m using a very similar same set-up (GMX account etc) with an Honor 6X and it works fine.