I have just purchased this TRM250 and i'm unable to see why I have very poor speeds, I've tried two different sims one vodafone (which I can obtain speeds of 10 Mbps (Capped to this) 4G yet I can only get around 90 kbps when in this modem, I also have tried with O2 can similar results from the the TRM250, and when I put this sim in a HUAWEI E8372 I get speeds in excess of 10 Mbps again on 4G, do I have a faulty modem? Thanks