The all-metal miracle with invisible antenna Every smartphone needs antennas but radio waves won't pass through metal - that's why so many smartphones designs are marred by ugly gaps. But not ZenFone 3 Ultra. Engineers' pursuit of perfection and technical prowess ascend a new pinnacle with ZenFone 3 Ultra, integrating the antennas in such a way as to make them invisible. The result is gapless beauty and uncompromised signal quality. A sleek, diamond-cut wonder with an all-metal unibody that seems impossible - that's ZenFone 3 Ultra. The journey to perfection Start with finest aerospace-grade alloy, precision-milled with 0.18mm diamond-cutting technology to create the optimum balance of strength and sleekness for ZenFone 3 Ultra's all-metal frame. Then abrade the surface with a hyperfine sanding process, polishing it to a beautifully smooth finish - just one of the 240 precision steps it takes to create perfection. All your entertainment, upgraded ZenFone 3 Ultra means mobile entertainment as you've never before experienced. With its incredible display, advanced speakers and multitude of advanced audiovisual technologies, you'll enjoy vivid details, smooth motion and outstanding audio pleasures. You're even able to transmit your favorite content to any screen with a high-quality DisplayPort connection through its USB-C port. You demand the best video, music, gaming, and reading experiences, so demand the best mobile entertainer - ZenFone 3 Ultra! LTE B1/B3/B5/B7/B8/B18/B19/B20/B26/B28/B38/B40/B41 *****Please check with your carrier for compatibility. We are not responsible for any incompatible issues.