“What can you do with an iphone that you can’t do with a PC and a regular landline telephone?”
Unless the conductor allows you to take up two seats, one for you and one for the pc, monitor and large battery pack and you have about 45 miles of rj11 cable extending from your phone jack, and the conductor on the morris and essex line allows you to trail it behind the train, the iphone is a much easier, cost effecte and efficient way to stream a shiur while commuting to and from work.