Verizon just announced a new maintenance update for the DROID RAZR M that brings various fixes to the device, including improved Wi-Fi connectivity, voice call volume, and visual voicemail connectivity. The camera's touch-to-focus is now also better, apparently, and the camera itself will take better low-light photos. Expect the update to roll out in the next week or two. You can see the complete changelog in the image below.
The last update to roll out to the RAZR M was Android 4.1, back in November.