I am experiencing constant problems with the Obi wifi plug that I use for wireless access with my Obi 200 device. About once a week, it looses connection. And of course I am not aware of that so I lose phone calls. And most of the time even when its working it drops the call in the middle after a few minutes. What can I do about this? A hardwired connection isn't an option because the obi device cannot be near my router.