content: Even better, have a phone in the glove compartment and keep a seperate, charged battery in there, too. Putting a phone into a metal pouch or any other Faraday cage will make it raise its transmission power to max because it won't be able to find a cell tower. That'll kill the battery in a hurry. Its why in the car I don't keep my phone in pocket so there's potentially better reception. Remember, humans are ugly bags of mostly water.