• No, none of your contacts have access to your Telegram groups or channels.
• Telegram groups can have up to 200,000 members, whereas Telegram channels can have an unlimited number of users. All members of a Telegram group can view and communicate with each other. A Telegram channel subscriber, on the other hand, is unable to observe the other participants.
• If you set the privacy settings for who can message you or see your phone number to Nobody, the person you add to your phonebook will not be alerted.

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