Complex sentence: Digital immigrants are said to have a "thick accent" when operating in the digital world in distinctly pre-digital ways, when, for instance, he might "dial" someone on the telephone to ask if his e-mail was received.
Split into simpler sentences: Digital immigrants are said to have a "thick accent" when operating in the digital world in distinctly pre-digital ways. For instance, the digital immigrant might "dial" someone on the telephone to ask if their e-mail was received.