The optimal dimension of the avatar on Telegram is 512px by 512px, and it’s recommended to use PNG format to deliver an unpixelated avatar. 4How to customize a Telegram channel? But a Telegram statement also said: "Any requests related to political censorship or limiting human rights such as the rights to free speech or assembly are not and will not be considered." Add up to 50 administrators You can invite up to 200 people from your contacts to join your channel as the next step. Select the users you want to add and click “Invite.” You can skip this step altogether.
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