Call history is a log of incoming, outgoing, and missed calls recorded on your phone, including the other party's number (or contact name), date/time, and duration.
Beyond checking missed calls, call history serves as crucial evidence in harassment cases. Screenshots showing dates, times, frequency, and volume of nuisance calls or phone harassment provide objective proof for police reports and legal proceedings.
Smartphone call history has storage limits (typically a few hundred entries), with old records auto-deleted. Save important records via screenshots or call logging apps.
Carrier call detail records (available through My docomo, My au, My SoftBank) mainly cover billable outgoing calls. To document incoming calls, preserving the call history on your device (for example with screenshots) is the primary approach.
Withheld calls appear as "Number Withheld" but still record the date and time, helping identify patterns of harassment for call rejection decisions or police consultation.