Sogo v webtop syncing with android and thunderbird

After trying webtop5 and realizing that I really need Thunderbird calendar syncing I went back to sogo. Now I can get email, contacts, and calendars to sync properly with thinderbird but I can only sync email and calendars with my android phone. Contacts will not sync with my android phone. Anybody know where the problem could be?

What is the carddav client you use with android. I’m not sure to recommand activesync

I had no idea that I needed a separate app to sync contacts on my android phone. Cardav-sync free did the trick.

Thank you!