The ZTE MF820D can access LTE networks in the 800MHz, 1.8GHz and 2.6GHz bands. The modem is expected to start shipping in July. TeliaSonera, Telenor and Tele2 are already offering commercial LTE services in the 2-6GHz band. Three recently purchased TDD (Time-Division Duplex) spectrum from Intel, which it intends to use for LTE. Three wants modems that can handle LTE FDD and TDD at the same time, but that will not arrive until next year.”]
Source: https://www.csoonline.com/article/2127667/teliasonera–zte-readies-first-multimode-lte-modem.html