Even the phone makers and wireless carriers couldn’t have known just how big the smartphone would become.

A new study by Bank of America found 47 percent of U.S. mobile phone users wouldn’t want to go a single day without their smartphone.

The survey included 1,000 banking customers who use smartphones.

Large segments of the respondents said they’d rather go a day without coffee (60 percent) or alcohol (79 percent).

“When asked what they would give up to regain access to their mobile phone, nearly four in five (79 percent) of respondents would be willing to give up alcohol or chocolate,” the report states.

Ninety-one percent said they care about their mobile devices as much as they care about their car and deodorant.

To Millennials, their smartphones were more important to them that deodorant and toothbrushes.

Overall, there were only two things that those surveyed would be less likely to give up for a day than smartphones — personal hygiene and the Internet.