Sorry I had to vote for the mackeral thing because I really don't like to read on my phone and I usually have my ereader with me but sometimes (when I least expect it) I end up with a few minutes spare and NO ereader!!
What's a girl to do but whip out the teeny tiny phone and find something to read. I'm not sure which is worse - the pain in my eyes or the RSI in my fingers from constantly flipping the pages.
So if I hadn't clicked on the fish option my answer would have been I rarely read on my phone because I really don't like but I'm addicted to reading so I can't help myself sometimes.