Telegram Android app: Open the chats list, click the menu icon and select βNew Channel.β The optimal dimension of the avatar on Telegram is 512px by 512px, and itβs recommended to use PNG format to deliver an unpixelated avatar. Channel login must contain 5-32 characters 4How to customize a Telegram channel? For crypto enthusiasts, there was the βgmβ app, a self-described βmeme appβ which only allowed users to greet each other with βgm,β or βgood morning,β a common acronym thrown around on Crypto Twitter and Discord. But the gm app was shut down back in September after a hacker reportedly gained access to user data.
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