My signal was not bad when I first bought the phone but now it is horrible. Where my wife has a full 4g signal I barely get any signal at all and a lot of the time I just get no signal. I have to refresh web pages and the market constantly to get them to work at all. My phone has also started to reboot at least once a day and it never did that for the first few months I had it. Is anyone else having the same problems?