The use of hand-held cell phones while driving: Question The use of hand-held cell phones while driving: Answers Is permitted for drivers age 18 and older. Is permitted for drivers age 21 and older. Is permitted for drivers age 25 and older. Is prohibited. Explanation In Illinois, the use a hand-held cell phone or other communication device while operating a motor vehicle is prohibited. This questions appears in the following tests: Illinois Class B Knowledge Test
