Huh, how do I model this?

[bigcatpants]

I'm actually going through a similar problem myself, where I would try to print a very particular model, and after the job is sent to the printer [Da Vinci 1.0] The printer just goes back to the main menu, no bed/nozzle heating or anything. Every one of my other models have printed, but this model is the first that simply "befuddles" the printer and doesn't do anything.

Here's the STL [ran it through Microsoft's Model Repair Service as I saw it on another thread]: http://www.filedropper.com/cellphone...ungnexussfixed

This was made in TinkerCAD, which seems to be rather legit in making 3D printable models. Here it is in its original form:
https://www.tinkercad.com/things/9tI...amsung-nexus-s

Thanks for your time, everyone!

e: Initially, instead of the rear being a big solid block, it wasa slanted slab with a vertical slab in the middle to hold it up. That first design didn't print [same problem] and so now I have the big solid rear as the latest iteration which also doesn't print. My assumption is that the hollow half-donut [the "horn"] is the problem. Any ideas?