Telegram for iOS and Android have just reached v5.2.

Group admins can set default permissions to restrict all members from posting specific kinds of content. Telegram groups can now have up to 200,000 members.

When you delete a chat or clear chat history, you'll get a detailed confirmation dialog and an option to restore the chat within the next 5 seconds.

We've also added new streamlined group settings, new contact sorting options, better thumbnails, improved animations, stylish new search bars on iOS, an improved dark mode on Android – and more.

Read more on our blog:
https://telegram.org/blog/permissions-groups-undo