Band 66 is an LTE operating frequency Band. LTE is designed to work across a number of frequency bands – E-UTRA operating bands- currently ranging from 450 MHz up to 3.8GHz. … LTE Band 66 is defined as for use as follows: Frequency Range:1710 – 1780 MHz UL / 2110 – 2200 MHz DLWidth of Band:90MHzLTE Band 66 www.4g-lte.net › About 4G LTE › 4G LTE Frequency Bands