Driver Hi-tech Needs??

The easiest way to know if something is tax deductible is to ask if you were home would you still have the same expense as being on the road?

That sums it up. I don't n-e-e-e-d a smart phone at home. I guess the argument will be that I do need a smart phone on the road. It is more of a necessity than a convenience. Map tool, company paperwork tool, apps tool....you know the necessity more than I do.

Thanks.