Cell phone pinned to car dashboard

If you don't want to buy or temporarily don't have a cell phone mount or cradle to fasten to the dashboard of your car, you can use a rubber band to pin the cell phone to the dashboard. Spread it so that it catches on the tabs of the two center A/C vents (the tabs that allow you to direct the air flow). Then slide your cell phone under the rubber band. If the distance between the two vent tabs is too big for the rubber band, link multiple rubber bands together. Or if there are two radio knobs (e.g. one for volume the other for tuning), see if the rubber band can be spread to catch on these knobs.