Cellphone bans in some states' public schools take effect as experts point out pros and cons

Some U.S. states and school districts are heeding calls for stricter protocols or even outright bans on cellphone usage by students.

Arizona is the latest state attempting to restrict usage, according to reports, with the legislature arguing that while districts can individually tackle the issue, a wider law is necessary. 

In April, Gov. Katie Hobbs vetoed a bill that would have limited cellphone use in Arizona's public schools.