illegal phone
a phone from a different wireless service provider than the one a person is currently employed by (such phones are generally prohibited on the premises)
Ed can't use his Blackjack II while he's working at Verizon as it's an illegal phone.
illegal cell phone
What cell phones are called insied a mariner classroom
He got booked for 3 years in mariner jail for the possesion of a cell phone on mariners school country teratory.