I work in a huge federal building and everyone has cel phones. Everybody in the Pentagon and the Capitol has cel phones. And they use them all the time. They aren’t banned. I can’t think why they would ban them from a county courthouse or a Social Security office. It doesn’t make any sense. The hospital ban I can understand, but the only other reason I can think of to ban them is the annoyance factor, in which case that is a very arbitrary decision.
FWIW, in Albermarle Cty, VA the Juvenile and Domestic Relations Court judges asked (ordered) us deputies to keep cell phones out of the court room because most phones can take pictures.