I too had the same issue with 2 different Huawei dongles in a 2862 - worked fine in a laptop, but n/g in the Draytek. Tech support where their usual prompt selves and said neither *precise* model was on their approved list. In the end I purchased a 2862 lac with built in 4G which works like a dream. Sad but true, and essential is it was for an unstaffed remote site running various telemetry stuff. ;}