New York City is preparing to end its ban on cellphones in schools.

That will fulfill a campaign promise of Mayor Bill de Blasio's but it will signal the death knell for an industry that sprang up near dozens of schools where teens could park their phones in a van for a dollar a day.

De Blasio acknowledged last month that his own son brings a phone to his and said parents must be able to reach their kids.

He gave no date for ending the ban but said "there is an urgency."

A policy that allows phones inside a school but tells students to keep them stowed during class will bring New York in line with other large school districts such as Los Angeles, Chicago and Atlanta.