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. Image: Telegram. Telegram has announced a number of measures aiming to tackle the spread of disinformation through its platform in Brazil. These features are part of an agreement between the platform and the country's authorities ahead of the elections in October. Telegram Android app: Open the chats list, click the menu icon and select “New Channel.” It’s easy to create a Telegram channel via desktop app or mobile app (for Android and iOS):
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