Retention Periods for Non-Content Data:

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Information about in-app settings, privacy settings (e.g., who can see "last seen" or profile photo), and records of accepted terms.
Community and Group Information: Details about communities and groups you are part of.
Contacts List: WhatsApp accesses your device's address book to help you connect with other WhatsApp users. While it hashes this data, it doesn't store your contacts' phone numbers on its servers in a way that allows it to link them directly to you, beyond facilitating communication.

WhatsApp's privacy policy generally states that they retain information "for as long as necessary to provide our Services or for other legitimate purposes such as complying with legal obligations, enforcing and nepal phone number list preventing violations of our Terms, to fight spam or protecting or defending our rights, property and users." The exact storage periods are determined on a case-by-case basis.

While specific, granular retention periods for all metadata categories are not publicly detailed, some general principles can be inferred:

Log Data: Certain log data may be retained even after account deletion, but it is disassociated from identifying information.
Undelivered Messages/Media: As mentioned, these are retained for up to 30 days.
Account Information: Basic subscriber information (phone number, name, service start date) is typically retained as long as the account is active.