Uh, all of the above. I want to say I've been using my phone more lately, but I also use my work laptop and check TBT when I have downtime at work. I also am planted on my PC when I'm home for the night.
I originally voted laptop but now I'm on my phone everyday and don't really have the energy to get out my laptop. I don't know if I should change my vote but it's interesting how things change over time.
I tend to use the computer/pc, I tend to access forums through my computer and don't really use any other method to access the forums. I sometimes will use my iPhone if I'm not by my computer or am in the car going on vacation or something.