A mobile wireless communication device comprising: a housing; at least one wireless transceiver carried by said housing; an antenna carrier carried by said housing; and a multiple-band antenna on said antenna carrier and connected to said at least one wireless transceiver, said multiple-band antenna comprising an elongate base conductor having opposing first and second ends and opposing first and second sides extending between the first and second ends, said elongate base conductor having a first L-shaped slot with a proximal end opening outwardly at the first side of said elongate base conductor adjacent the first end thereof and having a distal end adjacent a medial portion of said elongate base conductor, said elongate base conductor having a second L-shaped slot with a proximal end opening outwardly at the first side of said elongate base conductor adjacent the medial portion thereof and having a distal end adjacent the second end of said elongate base conductor, the distal end of said second L-shaped slot extending closer to the second end of said elongate base conductor than the distal end of said first L-shaped slot, an elongate tuning arm conductor extending outwardly from the second side of said elongate base conductor adjacent the first end thereof, a first feed point defined on said elongate base conductor between the first end thereof and the proximal end of the first L-shaped slot, and a second feed point defined on said elongate base conductor between the proximal ends of the first and second L-shaped slots. a housing; at least one wireless transceiver carried by said housing; an antenna carrier carried by said housing; and a multiple-band antenna on said antenna carrier and connected to said at least one wireless transceiver, said multiple-band antenna comprising an elongate base conductor having opposing first and second ends and opposing first and second sides extending between the first and second ends, said elongate base conductor having a first L-shaped slot with a proximal end opening outwardly at the first side of said elongate base conductor adjacent the first end thereof and having a distal end adjacent a medial portion of said elongate base conductor, said elongate base conductor having a second L-shaped slot with a proximal end opening outwardly at the first side of said elongate base conductor adjacent the medial portion thereof and having a distal end adjacent the second end of said elongate base conductor, the distal end of said second L-shaped slot extending closer to the second end of said elongate base conductor than the distal end of said first L-shaped slot, an elongate tuning arm conductor extending outwardly from the second side of said elongate base conductor adjacent the first end thereof, a first feed point defined on said elongate base conductor between the first end thereof and the proximal end of the first L-shaped slot, and a second feed point defined on said elongate base conductor between the proximal ends of the first and second L-shaped slots. an elongate base conductor having opposing first and second ends and opposing first and second sides extending between the first and second ends, said elongate base conductor having a first L-shaped slot with a proximal end opening outwardly at the first side of said elongate base conductor adjacent the first end thereof and having a distal end adjacent a medial portion of said elongate base conductor, said elongate base conductor having a second L-shaped slot with a proximal end opening outwardly at the first side of said elongate base conductor adjacent the medial portion thereof and having a distal end adjacent the second end of said elongate base conductor, the distal end of said second L-shaped slot extending closer to the second end of said elongate base conductor than the distal end of said first L-shaped slot, an elongate tuning arm conductor extending outwardly from the second side of said elongate base conductor adjacent the first end thereof, a first feed point defined on said elongate base conductor between the first end thereof and the proximal end of the first L-shaped slot, and a second feed point defined on said elongate base conductor between the proximal ends of the first and second L-shaped slots.