No phone calls while sleeping during commuting. Obviously, right? Well, I actually witnessed myself in another passenger. He received a call and he answered, ” You disturbed my sleep, what now?” Me, I learned it that way too thus I always give my husband a call before going to sleep in my travel time. I am very clear with the instruction that I will be the one to call and I do not want to receive any call while I am sleeping. Zzzzzz.