The majority still are. However, these are the the (relatively) cheap ones. IBD, for example, polls 65% cell phones and this becomes expensive. LA Times provides subjects in their group with electronic devices, and this is expensive, too.
What the majority of published polls are calling is individuals with landlines, no caller ID and time to spend talking to a 20-year old co-ed interviewer. And I do believe that Clinton polls ahead of Trump with that group! What I do not believe is that this group represents the population going to the polls and actually voting.
In some I’m sure they do not even call anyone. Instead they just make up numbers out of whole cloth. But I’m trying to figure out, is what a video of a one-sided poll taking might show. Unless they announce that the conversation might be recorded and for possible distribution, in most instances this is illegal.