What is the longest retention time of Apple's mobile phone call records?

The call record of Apple's mobile phone can be stored in 100.

The call record of Apple's mobile phone is not stored by time, but by the number of calls. If the phone call record is less than 100 within seven days, the record will still be saved. If it exceeds 100, it will automatically start cleaning, but multiple calls of the same contact person on the same day are only counted as a communication record.

Call record refers to all kinds of information recorded on the operator's switch by calling, called, calling short messages, called short messages and roaming calls initiated by fixed telephone users and mobile telephone users. Call records provide a basis for operators to charge fees, and also provide a basis for users to verify their calls.

Inquiry method of offline business hall call records:

For offline business hall inquiry, the owner needs to carry personal identification, show the certificate proving the owner's identity to the business hall staff, verify the inquiry password, inquire and print the call record, or enter the password in the self-service server for inquiry.

It's free to check the phone records. Article 66 of the Telecommunications Regulations stipulates that no unit or individual has the right to inquire about telecommunications except public security, national security and procuratorial organs.