T-Mobile rolling out Android 9 Pie update for the Samsung Galaxy S9/S9+
Besides bringing both Samsung flagships to Android 9.0 Pie, the update also adds support for advanced messaging options like RCS (Rich Communication Services). The latter is meant to replace the SMS and MMS standards by enabling users to share images, videos, sound clips, emoji, and stickers, just like traditional messaging apps such as Messenger and WhatsApp.
Moreover, RCS Messaging supports group chats, audio and video calls, locations sharing, read receipts, as well as other complex messaging features.
Now, if you own a T-Mobile Galaxy S9 or Galaxy S9+, you'll have to make sure that you have enough free storage to upgrade your phone's software since the update weighs in at around 1.9GB. It's also worth mentioning that your data stored on the phone should be safe, which means you're not required to make any backups.