I have operated this mobile modem with a Vodafone LTE card. Performance at the beginning of the tariff accordingly - but only in the midst of the big city (where even here repeatedly disconnections between the MacBook Air and the creep in modem). Direction country where - according to Vodafone - is definitely useful expanded LTE network, the Huawei modem receives virtually nothing or shows me though 4G (LTE) to but shoveling data in EDGE speed. Right next to an iPhone 5s with the same Vodafone LTE card transfers in "Two-beam LTE reception" still viable rates in the upper range 3G. Unit returns!