Telegram stores all data, i.e. all chats and also the bots, encrypted in the cloud. An external backup of the Telegram data is therefore not absolutely necessary and the entire personal settings are available to the logged-in users across platforms at any time and everywhere.

If you are chatting on a social network, the surest sign indicating that you're communicating with a bot is a blank user profile. Bots typically lack a profile picture and bio. More sophisticated bots may use a photo stolen from the Internet or an automatically generated account name.