The Android Messages app is getting an upgrade today! This upgrade will allow for Rich Communication Services, which means an even more awesome texting experience. Most Android models released after today will have the new Android Messages build in, however it will be available for download from the Play Store to all Android devices running 4.1 and 4.4 or higher. Note that the update is rolled out to devices in batches. You'll receive a notification to update it when it's available.
So, what’s changing exactly? Android Messages now has advanced features such as Typing Indicators, Deliver Receipts, Read Receipts, Group Messaging, and Photo/file/Location Sharing capabilities. Pretty cool eh?
Note: The advanced features only work from Messages to Messages, for now at least.