How to Create a Private or Public Channel on Telegram? Earlier, crypto enthusiasts had created a self-described โmeme appโ dubbed โgmโ app wherein users would greet each other with โgmโ or โgood morningโ messages. However, in September 2021, the gm app was down after a hacker reportedly gained access to the user data. The optimal dimension of the avatar on Telegram is 512px by 512px, and itโs recommended to use PNG format to deliver an unpixelated avatar. The channel also called on people to turn out for illegal assemblies and listed the things that participants should bring along with them, showing prior planning was in the works for riots. The messages also incited people to hurl toxic gas bombs at police and MTR stations, he added. 5Telegram Channel avatar size/dimensions
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