WiMAX is a wireless digital communication system that can provide broadband wireless access up to 30 miles (50 km) for fixed stations, and 3 - 10 miles (5 - 15 km) for mobile stations. In contrast, the WiFi/802.11 wireless local area network standard is limited in most cases to only 100 - 300 feet. You can experience download speeds of up to 4 Mbps and upload speeds of up to 500 Kbps.