Phones By emie123 Feb 23, 1992 The first hand held phone Jul 23, 1992 Hand held phones Oct 3, 1993 One of the first cell phones Jan 5, 1995 Bag phone Sep 8, 1997 Generation to old phone to new Jun 21, 1999 Making Cell phones Making cell phones deals with math. People need math to make cell phones because math is used to maodel phones and make the phones were it can coculate and make phone calls
