A study conducted by a broadband internet research group has found that millennials are more likely to develop anxiety at the thought of a voice-call compared to boomers. 50% of the former group also reported getting their parents to make doctor's appointments over the phone for them. However, this aversion abates in those aged 35 or older.
https://www.notebookcheck.net/Phone-calls-what-are-those-Most-US-millennials-are-found-to-be-more-comfortable-with-texting.459437.0.html