I'm testing out the ZTE Optik (Sprint) for an application we're running at work and I'm having an occasional problem with the device randomly shutting down. Then it seems to continue to reboot (on it's own) every minute or two after that. I have to catch it right after it reboots, then make sure I shut it down properly, and then it seems to work fine when I turn it back on. This has happened a few times over the last couple weeks and I'm wondering if anyone else has experienced this. ??? I've read that there is already an update available (build 09) but I haven't received it yet, and from what I read about it, I'm not sure it'll fix my problem. Any other users of this device, I'd like to hear what you think about it.