try your connectivity @ different location , let's say in drawing room or in terrace & yeah position of USB modem .Marcus Fenix said:shucks.
out go my dreams.But still haven't some people reported improvement using antennae in this forum.I am not sure if I can remember
it will varies with such way .If you sure your location has poor connectivity , double check it with your nearby tower to see if your device isn't making any trouble .