A lawsuit has been filed against AT&T (T), claiming that its $1.99 administrative fee isn’t included as part of the company’s advertised rates for its wireless service plans. The $1.99 fee in questions has allegedly been added to AT&T customer bills since 2013 when it was reportedly $0.61 per month. AT&T responded to the lawsuit by telling the news outlet that “The lawsuit is wrong. This is a …