In summary, the Telegram Bot API strictly adheres to user privacy regarding phone numbers. Bots can only gain access to a user’s phone number through a highly explicit, user-initiated consent mechanism via the request_contact keyboard button, reinforcing Telegram’s commitment to user control over personal data.
>Consent Management: It’s crucial for bot developers to clearly explain why they need the phone number to the user before requesting it. This builds trust and ensures genuine consent.
Telegram Login Widget (for Websites)
This is used for integrating Telegram telegram number database authentication into external websites.
Mechanism: Websites can embed a “Log in with Telegram” widget. When a user clicks this widget, they are redirected to Telegram for authentication.
Data Shared (with consent):
If the user authorizes the login, Telegram can send back certain user data to the website, which can include the phone number if specifically requested by the widget configuration and explicitly approved by the user during the authorization flow.
Privacy: The user must explicitly grant permission to share their phone number with the website.
If you are building a custom Telegram client (not just a bot)! you interact with the lower-level MTProto API or use TDLib (Telegram Database Library).
contacts.importContacts Method: This what is a product launch marketing plan? method allows a! custom client to import a list of phone numbers (from the device’s address book) to Telegram’s server to find corresponding Telegram users.
>Consent: This requires the user to grant the clean email client application permission to access their phone’s contacts, similar to how the official Telegram app works.
>Limitations: The importedContacts result will only return user_id and potentially a limited User object, not necessarily the phone number of the other user, unless that user’s privacy settings (Who can see my phone number?) allow it.