Welcome to Microsoft Teams
Microsoft Teams is the hub for teamwork in Microsoft 36...
iOS:
From your activity feed, tap Filter 
to show only certain types of messages such as unread messages, @mentions, replies, and likes. Use the feed options to select team or individual activity.
To customize your notifications, tap More 
> Settings > Notifications. From there tap Open settings to access your iOS settings for Teams. Then tap Notifications > Allow notifications to determine how you want to view Teams notifications.
Android:
From your activity feed, tap Filter to show only certain types of messages such as unread messages, @mentions, replies, and likes. Use the feed options to select team or individual activity.
To customize your notifications, tap More > Settings > Notifications.