To turn the device on or off, you press and hold this button for a few seconds. This screen goes off by itself after a few seconds and can be turned back on by pressing the power button, which is on the side of the device.
On top, it has a small LCD that shows all the important information, including the cellular signal strength, the type of the Internet connection (4G or 3G), the number of currently connected Wi-Fi clients, and a battery life gauge.
The device is compact enough to be easily tucked away. The T-Mobile 4G Mobile Hotspot is about the same size as the Sprint MiFi 4082 3G/4G Mobile Hotspot, though it looks more like a candy-bar-shaped mobile phone.