Just got the phone 2 days ago. Every time I try to make phone calls, it restarts itself. I am not sure why it does that. It does it on every contact that I have in the phone.
Mine phone reboots when I set it down and sometimes it will start up with the EMUI optimizing screen which can take up to 10 minutes . Very frustrating
I am having this exact same problem. Thought that it might be a firmware issue. Are you using Telus/Koodo by chance? I put a Koodo/Telus SIM in and it would do this, then I swapped in a Fido SIM and the problem stopped. Hoping there is a way around this, as I want to use Telus/Koodo.