Verizon Wireless has revealed the details of a system update for the Motorola Droid 4. The update does not bump the phone to Android 4.0 Ice Cream Sandwich, but provides a number of tweaks and fixes to the phone's performance. Some of the improvements include better battery life, better Wi-Fi performance, more reliable visual voicemail and messaging notifications, and fewer device lockups. The update can be downloaded and installed over the air. Verizon will push the update out over the next few weeks, though users can initiate the update on their own.