2021-8-11 · WiFiCube is a 3G/4G handheld wifi/mobile hotspot which provides secure, consistent and fast wireless internet connection wherever you are with no roaming fees or data overage charges! 1. 3G/4G speed, up to 150Mbps for download and 50Mbps for upload. 2. 4-6 hours of battery life, option to plug in your own external power bank.