There is no sound for anything except alarms and phone calls on the U2LTE, IIRC. I use Wear Messenger app though, and it is really cool. It allows sounds for texts (if you set it up to in the Wear Messenger app settings on your phone). It also allows you to set up tons of precanned text responses, more than the limited ones Google has. I use it on my U2LTE, but still use Google Messenger on my phone. It also has other cool stuff like access to my phone contacts and I can use it to initiate calls from within Wear Messenger. If you try it, remember to turn off notifications for the text app you use on your phone, or you'll get notifications from both Wear Messenger and your regular text apps on your U2LTE.