Version 2.06.06 looks to bring some stability to the Overdrive with some of the fixes, including enhancements to WiFi, 3G, and 4G connections. Battery life is said to be increased by about 10%, while one of the major complaints, the boot-up time, should be shortened by up to 20 seconds. Also, the device WAN mode can now be changed from 3G/4G to 3G only or 4G only without requiring a reboot, and additional 4G channels have been added for future use.
Hopefully the new update will take care of the numerous issues that have plagued the Overdrive since day one, such as dropped 3G/4G connections, device lock-ups, and flaky connectivity with the iPhone and iPod touch. I briefly tried an Overdrive a few months back and noticed significant improvements in each successive update, but there were still lingering issues that caused me to revert back to my tried-and-true Sprint MiFi, and now I have moved on to the EVO 4G's awesome new hotspot feature.
[Sprint – Overdrive Firmware Update v2.06.06]