Plus Messenger updated.

New in version 3.7.0.0:

WHAT'S NEW

PUBLIC GROUPS, PINNED POSTS, 5,000 MEMBERS

- Groups can now have 5,000 members (up from 1,000)
- Groups of any size may be converted to supergroups

New tools for supergroup admins:

- Make your group public by setting up a public link – anyone will be able to view the chat and join it
- Pin messages to keep important updates visible and notify all members
- Select messages to delete, report as spam, block users, or remove all messages from a user

https://telegram.org/blog/supergroups5k

https://play.google.com/store/apps/details?id=org.telegram.plus