The Pew article Mobile Technology and Home Broadband 2021 by Andrew Perrin (6/3/2021) summarizes the results of their smartphone and home broadband survey.
Smartphone ownership (85%) and home broadband subscriptions (77%) have increased among American adults since 2019 – from 81% and 73% respectively. Though modest, both increases are statistically significant and come at a time when a majority of Americans say the internet has been important to them personally. And 91% of adults report having at least one of these technologies.
There are differences between various groups (see their graph copied here):
The share of Americans with home broadband subscriptions has similarly grown since 2019 – from 73% of adults saying they have one in the previous survey to 77% today. There are more pronounced variations across some demographic groups, particularly in differences by annual household income and educational attainment. For example, 92% of adults in households earning $75,000 or more per year say they have broadband internet at home. But that share falls to 57% among those whose annual household income is below $30,000.
There are other graphs in the article and Pew provides a methodology section with access to data.