Tolong jelaskan mengenai Ponsel Quad Band dari Quad band

Nokia: E50, N73, N81, N80, N95

Sony Ericsson: W508, W910, Z300i, Z710i, W810i

Samsung: SGH-G600, SGH-U600, SGH-D900i, Champ C3300K, SGH-B3410

Motorola: V3i, ROKR Z6, Moto Q

O2: XDA II MINI, XDA Orbit