I am hoping the 2.0.0.10 release actually solved the annoying network error (this and this) audio alert played when calls not picked up or caller hangs up. That was the most embarrassing thing for me in using my Jolla in public.

This happened in USA with T-Mobile sim with voice mail, India with BSNL sim with no voice mail, Nexus 5 (v1.1.9.28) (currently my main phone) in USA T-Mobile. I am surprised this is not happening to many more people. It happened on every call if I am late to pick up the call.
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While waiting for a build of 2.0.0.10 for Nexus 5, I upgraded my Jolla, just because I saw this in the release notes.

"Dismissing call should now work more reliably"

Upgrade went smooth. I tested making several calls from couple other phones. I never got the network error message, when the calls evantually got transferred to voice mail or when I hung up the call from the calling phone.

I am hoping this really get resolved.

If it did, a big thanks to all the Jolla Sailors!!!!