Some may be unaware that messaging must be enabled in the Bluetooth settings in order to receive and reply text messages. I have also found that after updates this feature sometimes gets turned off. You get to the Bluetooth menu by tapping the Bluetooth symbol on the screen.
Mine has always been enabled. Never mattered, still never worked. I check it (and other settings) after each software update. So the issue lies somewhere else, apparently. But yes, it's always good to make sure it's enabled.