1. Missed calls are marked with a red icon (e. g. red phone icon).
2. The red icon disappears after the missed call is returned.
3. Multiple missed calls from the same number are displayed as single item with a number (of missed attempts) in brackets.
I believe points 1 and 3 describe the standard way this is done. Point 2 is probably not that common. My girlfriend had an old xiaomi redmi 4 which worked like that. Do new xiaomi phones work the same way? Are there any other brands or models doing it the same way?
Any suggestions would be greatly appreciated. Thank you.