I have an HC1M860M with MetroPCS service. The signal strength is just one bar and audio quality is terrible from my home. I'm hoping an external antenna will fix that. Has anyone tried hooking up an external antenna? Under the cover is something that looks like a coax connector which I suspect may be an antenna connector. I tried fishing around with my scope but couldn't find any signal; I suspect my scope just doesn't have a high enough response. I know this forum is mainly for software but I don't know of an appropriate hardware forum.