Did you ever got this message in Visual Studio output when started debugging a real device?
This evaluation version of the .NET Micro Framework runtime will
expire in 29 days, 23 hours, 55 minutes, and 0 seconds.
Well, the porting kit provides tools to build time-bombed runtime images. You get 720 hours of runtime – this means you could basically run the device for up to 2 years at 1 hour per day or a month (30 days) at 24 hours per day.
When starting with a new prototype (or a new device) some companies don’t care about this. What they need is to sign a volume license agreement with Microsoft telling them the real number of .NET MF licenses to flash a not time-bombed image.
If you own a device that will expire in some days simple download the latest firmware update on the company’s Web site and flash your device. The 720 hours will start again and again from the time of the last flash.