As far as I can tell, my OnePlus 3 has complete call logs for the past 6 months (last log 4-19-2018, today is 10-20-2018 which seems too much of a coincidence)
Logs are really useful but some calls I make only once a year so being able to keep (more) complete logs would be really useful.
Is this something that's configurable on Android? And, is there a way to sync this with my Google account so it's backed up even?