How many days can the mobile phone track be queried?

15 to 30 days. The itinerary code calculates the 14-day itinerary, but there will be a one-day delay, so the day's itinerary cannot be viewed in real time. Through big data technology, the individual's itinerary in the past 14 days can be recorded, but there will also be a one-day delay. Telecom , China Unicom, and China Mobile users can send text messages in a specific format to the operator, and after authorization, they can check the roaming trajectory of their mobile phones within 15 to 30 days.