Telegram stores your phone number

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Contacts: If you grant permission, Telegram syncs your phone contacts to identify users on the platform. These contacts are stored to notify you when your contacts join Telegram and to display names in notifications. You can disable contact syncing and delete synced contacts within the app's settings.
Basic Account Data: (as the primary identifier), profile name, profile picture, and "about" information. You can choose to keep only your username public.
Metadata: Telegram may collect metadata for up to 12 months to improve account security and prevent spam and abuse. This includes IP addresses, device information, app versions, history of username changes, and approximate location based on IP.
Email Address: If you enable 2-Step Verification or use Telegram Passport, you can provide a recovery email. This is only used for password recovery.
Paid Posts: If users pay to unlock specific channel posts, a permanent copy of the transaction history is created and stored, remaining accessible even if the post is later deleted.
Inactive Accounts: You can set your qatar telegram phone number list to automatically delete after a specified period of inactivity (default is six months, with options up to two years). If you don't log in during this period, your account and all associated messages, media, and contacts will be deleted.
Deleted Accounts: When you delete your account, all messages and contacts associated with it are permanently erased from Telegram's servers. However, messages sent in group chats will remain visible to other participants. Telegram may retain some metadata (like IP addresses and device information) for an unspecified period even after account deletion.
User Rights Regarding Their Data:

Based on Telegram's Privacy Policy and general data protection principles, you have the following rights:

Right to Access: You can request a copy of all your data that Telegram stores. This can usually be done through the app or via a dedicated bot (e.g., @EURegulation).
Right to Rectification: You can modify your profile information (name, username, profile picture) within the app.
Right to Erasure (Deletion): You can delete individual messages, entire chats, and your entire Telegram account through the app's settings. You can also set up automatic account deletion after a period of inactivity.