Hello, I was actually speaking in this forum (another topic) about Jami Android a few days ago :
As I said in the above quote, the main issue is the battery drain. Considering the Librem 5 overheating and power issue, this aspect must be a key point for all of us. I was really happy to get successful messages/voice IP call/ and video calls (although during video testing with both smartphones at the same home, I experienced heavy noise feedback effect, the conversation was totally just inaudible).
Anyway, to me Jami is a (huge) hope for Linux smartphone world. Thank you for your work !