I've seen a couple of threads suggesting issues with the Smart Key and a cell phone being "too close."

There are two places where there may be proximity -- on one's body (when options are limited) and in the car (where the cell is likely to be near the power outlets for charging and the key would often end up near there logically).

How big a deal is this? How do you handle it -- especially on one's person? I don't have my car yet and should know before delivery, I'd guess.